@book{regan_2004, title={Empty cages: Facing the challenge of animal rights}, ISBN={0742533522}, publisher={Lanham, MD: Rowman & Littlefield}, author={Regan, T.}, year={2004} }
 @book{regan_2004, title={The case for animal rights. (Updated and enlarged ed.)}, ISBN={0520243862}, publisher={Berkeley : University of California Press}, author={Regan, T.}, year={2004} }
 @book{regan_2003, title={Animal rights, human wrongs: An introduction to moral philosophy}, ISBN={0742533530}, publisher={Lanham, Md.: Rowman & Littlefield}, author={Regan, T.}, year={2003} }
 @inbook{gilland_regan_2002, title={Empty cages: animal rights and vivsection}, ISBN={0340857331}, booktitle={Animal experimentation: Good or bad?  (Debating matters)}, publisher={London: Hodder & Stoughton}, author={Gilland, T. and Regan, T.}, year={2002}, pages={19–36} }
 @book{regan_2001, title={Defending animal rights}, ISBN={025202611X}, publisher={Urbana, IL: University of Illinois Press}, author={Regan, T. H.}, year={2001} }
 @inbook{regan_1999, title={Introduction}, booktitle={Animal others: On ethics, ontology, and animal life}, publisher={Albany, N.Y.: State University of New York Press}, author={Regan, T.}, year={1999} }
 @inbook{regan_1999, title={The moral basis of vegetarianism}, booktitle={Ethical vegetarianism: From Pythagoras to Peter Singer: Pt. IV}, publisher={Albany: State University of New York Press}, author={Regan, T.}, editor={K. S. Walters and Portmess, L.Editors}, year={1999} }
 @inbook{regan_1998, title={Animal rights as natural rights}, booktitle={Animal rights: A philosophical defence}, publisher={New York: St. Martin's Press}, author={Regan, T.}, year={1998}, pages={87–119} }
 @inbook{regan_1998, title={Animal rights, human wrongs}, booktitle={Environmental philosophy: From animal rights to radical ecology (2nd ed.)}, publisher={Upper Saddle River, N.J.: Prentice Hall}, author={Regan, T.}, year={1998}, pages={41–55} }
 @inbook{regan_1998, title={Rights across species}, booktitle={Applied ethics in a troubled world}, publisher={Dordrecht ; Boston: Kluwer Academic}, author={Regan, T.}, editor={E. Morscher, O. Neumaier and Simons, P.Editors}, year={1998} }
 @inbook{regan_1998, title={The case for animal rights}, booktitle={Engineering, ethics, and the environment}, publisher={New York: Cambridge University Press}, author={Regan, T.}, editor={P. A. Vesilind and A, S. GunnEditors}, year={1998}, pages={251–254} }
 @inbook{regan_1998, title={The rights view}, booktitle={Encyclopedia of animal rights and animal welfare}, publisher={Westport, Conn.: Greenwood Press}, author={Regan, T.}, editor={M. Bekoff and Meaney, C. A.Editors}, year={1998} }
 @misc{regan_1997, title={Beyond prejudice: The moral significance of human and nonhuman animals.}, volume={10}, number={1}, journal={Journal of Agricultural & Environmental Ethics}, author={Regan, T.}, year={1997}, pages={79–82} }
 @inbook{regan_1997, title={The business of the moral philosopher}, booktitle={Explorations of value}, publisher={Amsterdam; Atlanta, GA: Rodopi}, author={Regan, T.}, year={1997} }
 @inbook{regan_1997, title={The case for animal rights}, booktitle={Law and the environment: A multidisciplinary reader}, publisher={Philadelphia: Temple University Press}, author={Regan, T.}, editor={R. V. Percival and Alevizatos, D. C.Editors}, year={1997}, pages={83–90} }
 @article{regan_1997, title={The rights of humans and other animals}, volume={7}, number={2}, journal={Ethics and Behavior}, author={Regan, T. H.}, year={1997}, pages={103–111} }
 @article{regan_1995, title={Obligations to animals are based on rights}, volume={8}, number={2}, journal={Journal of Agricultural & Environmental Ethics (Online)}, author={Regan, T.}, year={1995}, pages={171} }
 @inbook{regan_allen_1993, title={Vegetarianism and sustainable agriculture: The contributions of moral philosophy}, ISBN={0471580821}, booktitle={Food for the future : conditions and contradictions of sustainability}, publisher={New York : Wiley}, author={Regan, T. and Allen, P.}, year={1993}, pages={103} }
 @book{moore_regan_1991, title={The elements of ethics}, ISBN={0877227705}, publisher={Philadelphia, PA: Temple University Press}, author={Moore, G. E. and Regan, T.}, year={1991} }
 @book{regan_1983, title={The case for animal rights}, ISBN={0520049047}, publisher={Berkeley : University of California Press}, author={Regan, T.}, year={1983} }