books.google.com - This work is an exposition of the philosophic conceptions basic to Mahayana Buddhsim as found in the Maha-prajnaparamita-sastra a commentary on the Prajnaparamita-sutras and traditionally attributed to Nagarjuna. The sastra the earlist and most extensive work in this field is lost in its sanskrit original...http://books.google.com/books/about/N%C4%81g%C4%81rjuna_s_Philosophy_as_Presented_in.html?id=h-Mslj917EsC&utm_source=gb-gplus-shareNāgārjuna's Philosophy as Presented in the Maha-prajñāpāramitā-śs̄tra