Elementary differential equations and boundary value problems - Boyce, William E. 1930-; DiPrima, Richard C. 1927-1984 (Wiley, 1997)
Erg. bildet: Haines, Charles W.: Student solutions manual to accompany "Elementary differential equations", sixth edition, and "Elementary differential equations and boundary value problems", sixth edition, William E. Boyce, Richard C. DiPrima