@book {3004, title = {Lecciones y conversaciones sobre est{\'e}tica, psicolog{\'\i}a y creenciia religiosa}, year = {1992}, pages = {150}, publisher = {Ediciones Paid{\'o}s}, organization = {Ediciones Paid{\'o}s}, address = {Barcelona,Spain }, keywords = {teor{\'\i}a critica}, isbn = {847509807-x}, author = {Ludwig Wittgenstein} } @book {3003, title = {Tractatus logico-philosophicus }, year = {2001}, pages = {294}, publisher = {Edusp - Editora da Universidade de S{\~a}o Paulo }, organization = {Edusp - Editora da Universidade de S{\~a}o Paulo }, edition = {3{\textordfeminine} Edi{\c c}{\~a}o }, address = {S{\~a}o Paulo, Brasil}, keywords = {teor{\'\i}a critica}, isbn = {853140093-7}, author = {Ludwig Wittgenstein} }