Константинов, Георги. Баруни (по)мисли. София, Шрапнел, 2004. с. 211.
bris.ac.uk
efm.bris.ac.uk
Годуин, Уилям. Изследване на политическата справедливост // 12 декември 2013. Архивиран от оригинала на 2015-09-23. Equality of conditions, or, in other words, an equal admission to the means of improvement and pleasure, is a law rigorously enjoined upon mankind by the voice of justice (на английски)
marxists.org
Русо, Жан Жак. Общественият договор // 1762. Посетен на 12 декември 2013. I shall end this chapter and this book by remarking on a fact on which the whole social system should rest: i.e., that, instead of destroying natural inequality, the fundamental compact substitutes, for such physical inequality as nature may have set up between men, an equality that is moral and legitimate, and that men, who may be unequal in strength or intelligence, become every one equal by convention and legal right. (на английски)
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Годуин, Уилям. Изследване на политическата справедливост // 12 декември 2013. Архивиран от оригинала на 2015-09-23. Equality of conditions, or, in other words, an equal admission to the means of improvement and pleasure, is a law rigorously enjoined upon mankind by the voice of justice (на английски)