Coster, C., & Habets, P. (2006). Two-point boundary value problems lower and upper solutions. Elsevier.
Dyfyniad Arddull ChicagoCoster, C.De, and P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Amsterdam: Elsevier, 2006.
Dyfyniad MLACoster, C.De, and P. Habets. Two-point Boundary Value Problems Lower and Upper Solutions. Elsevier, 2006.
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