@misc{Yang2011, author = {Bohai Yang}, title = {The Possibility to Choose Freedom - Modern Spirit of a Philosophical Problem [自由选择何以可能 - 现代人精神问题的一种哲学寻求], Master thesis, Marxist Philosophy, Shaanxi Normal University, Xi'an, Shaanxi, China 2011.}, type = {dissertation}, year = {2011}, }