Chapter 62
Differential Equations, Linear, Nonlinear, Ordinary, Partial. A.C. King, J.Billingham, S.R.Otto. Cambridge Univ. Press 2003

62.1 Chapter 1 VARIABLE COEFFICIENT, SECOND ORDER DIFFERENTIAL EQUATIONS. Problems page 28
62.2 Chapter 3 Bessel functions. Problems page 89
62.3 Chapter 6. Laplace transforms. Problems page 172