[1] R. Kent Dybvig: The Scheme Programming Language, Fourth Edition, MIT Press, 2009. https://www.scheme.com/tspl4/

[2] Greg Michaelson: An Introduction to Functional Programming Through Lambda Calculus, Dover edition, 2011.

[3] Harold Abelson and Gerald Jay Sussman and Julie Sussman: Structure and Interpretation of Computer Programs, MIT Press, 1996. https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book.html

Lexical scopes: https://docs.racket-lang.org/guide/eval.html

Lazy evaluation: https://sites.ualberta.ca/~jhoover/325/CourseNotes/section/Scheme_3.htm

Streams: https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html

Side effects in scheme: https://courses.cs.washington.edu/courses/cse341/05au/lectures/scheme-side-effects.html

“Objects” in scheme: http://sarabander.github.io/sicp/html/3_002e1.xhtml

All sorts of materials on Haskell: https://haskell.org/documentation/

Creating Haskell types: http://learnyouahaskell.com/making-our-own-types-and-typeclasses

Haskell pattern matching: https://www.haskell.org/tutorial/patterns.html

Haskell modules: https://www.haskell.org/tutorial/modules.html

Haskell IO: https://wiki.haskell.org/Introduction_to_IO

Haskell IO: https://wiki.haskell.org/IO_inside

Haskell Monads: https://www.schoolofhaskell.com/user/bartosz/basics-of-haskell/10_Error_Handling

Haskell Functors: http://learnyouahaskell.com/functors-applicative-functors-and-monoids