Hillen, T., Leonard, I. E., & Van Roessel, H. (2012). Partial differential equations: Theory and completely solved problems. Wiley.

Hillen, Thomas, I. Ed Leonard, and Henry Van Roessel. Partial Differential Equations: Theory and Completely Solved Problems. Hoboken, New Jersey: Wiley, 2012.

Hillen, Thomas, et al. Partial Differential Equations: Theory and Completely Solved Problems. Wiley, 2012.