Chapter 86
An introduction to Differential Equations. By Howard Frederick Cleaves. 1969. Oliver and Boyd publisher. ISBN 0050015044

86.1 Chapter 3. Some standard types of differential equations. Exercise 3b at page 43
86.2 Chapter 3. Some standard types of differential equations. Exercise 3c at page 50
86.3 Chapter 4. Linear equations of the first order. Exercise 4a at page 56
86.4 Chapter 4. Linear equations of the first order. Exercise 4b at page 64
86.5 Chapter 5. Linear equations of the second order with constant coefficients. Exercise 5a at page 74
86.6 Chapter 5. Linear equations of the second order with constant coefficients. Exercise 5b at page 77
86.7 Chapter 5. Linear equations of the second order with constant coefficients. Exercise 5c at page 83
86.8 Chapter 5. Linear equations of the second order with constant coefficients. Exercise 5e at page 91
86.9 Chapter 7. Polar coordinates and vectors. Exercise 7a at page 109
86.10 Chapter 9. The operational method. Exercise 9b at page 134
86.11 Chapter 9. The operational method. Exercise 9c at page 137
86.12 Chapter 10. The Laplace transform. Exercise 10c at page 156