books.google.com - These twenty papers were selected by the author. The book includes a major introduction by Werner Hildenbrand, who assesses Professor Debreu's contribution to economic theory and explains the part played by these papers in the development of the subject....https://books.google.com/books/about/Mathematical_Economics.html?id=wKJp6DepYncC&utm_source=gb-gplus-shareMathematical Economics