@book{Burckhardt, author = {Burckhardt, J.}, title = {The civilization of the Renaissamce in Italy. Vol. 1, New York (Harper \& Brothers) 1958.}, language = {en} } @book{Burckhardt, author = {Burckhardt, J.}, title = {The civilization of the Renaissance in Italy Vol. 2, New York (Harper \& Brothers) 1958.}, language = {en} }