[BM]
Paul W. Berg and James L. McGregor, Elementary Partial Differential Equations, Holden-Day, San Francisco, CA, 1966.
1
books.google.com/books?id=EfJQAAAAMAAJReferences Further Reading
[BD]
William E. Boyce and Richard C. DiPrima, Elementary Differential Equations and Boundary Value Problems, 11th edition, John Wiley & Sons Inc., New York, NY, 2017.
2
books.google.com/books?id=SyaVDwAAQBAJ[EP]
C.H. Edwards and D.E. Penney, Differential Equations and Boundary Value Problems: Computing and Modeling, 5th edition, Pearson, 2014.
3
books.google.com/books?id=wuWvoAEACAAJ[F]
Stanley J. Farlow, An Introduction to Differential Equations and Their Applications, McGraw-Hill, Inc., Princeton, NJ, 1994. (Published also by Dover Publications, 2006.)
4
books.google.com/books?id=_ozWAAAAMAAJ[I]
E.L. Ince, Ordinary Differential Equations, Dover Publications, Inc., New York, NY, 1956.
5
books.google.com/books?id=uYz-pqUD75gC[T]
William F. Trench, Elementary Differential Equations with Boundary Value Problems, Books and Monographs, Book 9, 2013,
https://digitalcommons.trinity.edu/mono/9.
