1. ANSI. American National Standard: Programming Language—Common Lisp. ANSI X3.226:1994 (R1999), 1994.
2. R. Burstall. Christopher Strachey—Understanding programming languages. Higher Order Symbolic Computation, 13(1–2):51–55, 2000.
3. D. Fuchs. TeX font metric files. TUGboat, 2(1):12–16, Feb. 1981. https://tug.org/TUGboat/tb02-1/tb02fuchstfm.pdf
4. M. Herda. The Common Lisp Condition System. Apress, 2020. https://doi.org/10.1007/978-1-4842-6134-7
5. S.E. Keene. Object-Oriented Programming in Common Lisp: a Programmer’s Guide to Common Lispos. Addison-Wesley, 1989.