@book{135, author = {Rosen, Kenneth H.}, title = {Discrete mathematics and its applications /}, publisher = {Tata McGraw-Hill,}, year = {c2003.}, address = {Boston ;}, edition = {5th ed.}, url = {http://www.worldcat.org/title/discrete-mathematics-and-its-applications/oclc/49719375&referer=brief_results} }