Fundamentals of differential equations (3. ed.). - R. Kent Nagle; Edward B. Saff (Addison-Wesley, 1993)

Fundamentals of differential equations (4.ed.). - R. Kent Nagle; Edward B. Saff (Addison-Wesley, 1996)

Fundamentals of differential equations and boundary value problems (2. ed.). - R. Kent Nagle; Edward B. Saff (Addison-Wesley, 1996)

Fundamentals of Differential Equations and Boundary Value Problems, 6th Edition. - R. Kent Nagle; Edward B. Saff; Arthur David Snider (Pearson Education, 2014)

Fundamentals of Differential Equations, 8th Edition. - R. Kent Nagle; Edward B. Saff; Arthur David Snider (Pearson Education, 2014)