Hartman, P. (1982). Ordinary differential equations (2a. ed.). Birkhäuser.
Cita Chicago (17th ed.)Hartman, Philip. Ordinary Differential Equations. 2a. ed. Boston: Birkhäuser, 1982.
Cita MLA (9th ed.)Hartman, Philip. Ordinary Differential Equations. 2a. ed. Birkhäuser, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.