R. Arneson, Egalitarianism, In: The Stanford Encyclopedia of Philosophy, 2008.

M. Bekoff, Why «good welfare» isn't «good enough»: minding animals and increasing our compassionate footprint, ARBS Ann. Rev. Biomed. Sci., Theme Topic on «Unraveling Animal Welfare, vol.10, pp.1-14, 2008.

R. Botreau, M. Bonde, and A. Butterworth,

P. Perny, M. B. Bracke, J. Capdeville, and I. Veissier, Aggregation of measures to produce an overall assessment of animal welfare. Part 1 -A review of existing methods, Animal, vol.1, pp.1179-1187, 2007.
URL : https://hal.archives-ouvertes.fr/hal-02659977

R. Botreau, M. B. Bracke, P. Perny, A. Butterworth, J. Capdeville et al., Aggregation of measures to produce an overall assessment of animal welfare: Part 2 -Analysis of constraints, Animal, vol.1, pp.1188-1197, 2007.
URL : https://hal.archives-ouvertes.fr/hal-02659977

R. Botreau, I. Veissier, A. Butterworth, M. B. Bracke, and L. J. Keeling, Definition of criteria for overall assessment of animal welfare, Anim. Welfare, vol.16, pp.225-228, 2007.
URL : https://hal.archives-ouvertes.fr/hal-02665850

R. Botreau, J. Capdeville, P. Perny, and I. Veissier, Multicriteria evaluation of animal welfare at farm level; an application to MCDA methodologies. Fondations of Computing and Decision Sciences, vol.33, pp.287-316, 2008.
URL : https://hal.archives-ouvertes.fr/hal-02656060

R. Botreau, I. Veissier, and P. Perny, Overall assessment of cow welfare: strategy adopted in Welfare Quality ®, Anim. Welfare, vol.18, pp.363-370, 2009.
URL : https://hal.archives-ouvertes.fr/hal-02755817

D. Bouyssou, Building criteria: a prerequisite for MCDA, Readings in multiple criteria decision-aid, pp.58-80, 1990.

D. Bouyssou, T. Marchant, M. Pirlot, P. Perny, A. Tsoukias et al., Evaluation and decision models a critical perspective, 2000.
URL : https://hal.archives-ouvertes.fr/hal-01573453

, Kluwer's academic publishers, p.274

M. B. Bracke, B. M. Spruijt, and J. H. Metz, Overall animal welfare assessment reviewed. Part 1: Is it possible? Neth, J. Agric. Sci, vol.47, pp.273-291, 1999.

D. M. Broom, W. J. Blokhuis, E. Canali, A. A. Dijkhuizen, R. Fallom et al., Communication de la commission au conseil et au parlement européen sur la législation applicable au bien-être des animaux d'élevage dans les pays tiers et sur son incidence pour l'UE, COM, 626, p.138, 1995.

, Attitudes of consummers towards the welfare of farmed animals. Wave 2, )/Wave 64.4 -TNS Opinion & Social, vol.229, p.60, 2007.

, Attitudes of EU citizens towards Animal Welfare -Special eurobarometer 270/Wave 66.1 -TNS Opinion & Social, Anim. Welfare, vol.17, pp.103-117, 1995.

D. Fraser, D. M. Weary, E. A. Pajor, and B. N. Milligan, A scientific conception of animal welfare that reflects ethical concerns, Anim. Welfare, vol.6, pp.187-205, 1997.

M. Grabisch and M. Roubens, Application of the Choquet integral in multicriteria decision making, Fuzzy measures and integrals. Theory and applications, pp.348-374, 2000.
URL : https://hal.archives-ouvertes.fr/hal-01573484

L. Holm, C. Ritz, and J. Ladewig, Measuring animal preferences: Shape of double demand curves and the effect of procedure used for varying workloads on their crosspoint, Appl. Anim. Behav. Sci, vol.107, pp.133-146, 2007.

M. Miele, I. Veissier, A. Evans, and . Accepté, Animal welfare: establishing a dialogue between science and society, Anim. Welfare, special issue Knowing animals
URL : https://hal.archives-ouvertes.fr/hal-02648137

F. Napolitano, A. Girolami, and A. Braghieri, Consumer liking and willingness to pay high welfare animal-based products, Trends Food Sci. Technol, 2010.

P. Perny, Multicriteria filtering methods based on concordance and nondiscordance principles, Ann.Operat. Res, vol.80, pp.137-165, 1998.
URL : https://hal.archives-ouvertes.fr/hal-01195771

R. Polten, Proceedings of the workshop Animal welfare improving by labelling?, p.86, 2007.

B. Roy, Méthodologie Multicritère d'Aide a la Décision, Economica, p.423, 1985.

B. Roy, The outranking approach and the foundations of ELECTRE methods, Theory and Decision, vol.31, pp.49-73, 1991.

B. Roy, Decision Science or Decision-Aid Science?, Eur. J. Operat. Res, vol.66, pp.184-204, 1993.

I. Veissier, K. K. Jensen, R. Botreau, and P. Sandøe, Highlighting ethical choices underlying the scoring of animal welfare in the Welfare Quality ® scheme, Anim. Welfare, special issue Knowing animals, 2010.

A. J. Webster, The Virtuous Bicycle: a delivery vehicle for improved farm animal welfare, Anim. Welfare, vol.18, pp.141-147, 2009.

, Welfare Quality ® assessment protocol for cattle (fattening cattle, dairy cows, veal calves), Welfare Quality ® Consortium, p.182, 2009.

, Welfare Quality ® assessment protocol for pigs (sows and piglets, growing and finishing pigs), Welfare Quality ® Consortium, p.114, 2009.

, Welfare Quality ® assessment protocol for poultry (broilers, laying hens), Welfare Quality ® Consortium, p.114, 2009.

H. R. Whay, D. C. Main, L. E. Green, and A. J. Webster, An Animal-based welfare assessment of group-housed calves on UK dairy farms, Anim. Welfare, vol.12, pp.611-617, 2003.