Coster, C., & Habets, P. (2006). Two-point boundary value problems lower and upper solutions. Elsevier.
Chicago-стиль цитированияCoster, C.De, and P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Amsterdam: Elsevier, 2006.
MLA-цитированиеCoster, C.De, and P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Elsevier, 2006.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.