3.1 problem Kovacic 1985 paper. page 13. section 3.2, example 1
 3.2 problem Kovacic 1985 paper. page 14. section 3.2, example 2
 3.3 problem Kovacic 1985 paper. page 15. Weber equation
 3.4 problem Kovacic 1985 paper. page 19. section 4.2. Example 1
 3.5 problem Kovacic 1985 paper. page 23. section 5.2. Example 1
 3.6 problem Kovacic 1985 paper. page 25. section 5.2. Example 2
 3.7 problem Kovacic 2005 paper. Example 2
 3.8 problem David Saunders 1981 paper. Example 1
 3.9 problem David Saunders 1981 paper. Example 3
 3.10 problem Carolyn J. Smith 1984 paper. Appendix B examples and tests. Example 1
 3.11 problem Carolyn J. Smith 1984 paper. Appendix B examples and tests. Example 2
 3.12 problem Carolyn J. Smith 1984 paper. Appendix B examples and tests. Example 3