https://openlibrary.org/books/OL5760644M.opdsAdvanced engineering mathematics2022-10-18T07:53:33ZErwin Kreyszighttps://openlibrary.org/authors/OL144195A/Erwin_KreyszigWileyNew YorkLondonSydneyToronto1972xvii, 866 p.24 x 17 x 4 centimeters3d ed.Bibliography: p. 789-793.enghttps://openlibrary.org/books/OL5760644Mhttps://archive.org/details/advancedengineer00kreyurn:ISBN:047150728871172951