Intro to Abstract Algebra: Sources

“CS202: Discrete Structures | Unit 9.” Saylor Academy. License: CC BY: Attribution.

Aspnes, James. (2022). Chapters 13 and 14. Notes on Discrete Mathematics. License: CC BY-SA: Attribution-ShareAlike.

Doerr, Al and Levasseur, Ken. (2024). Chapters 11, 12 and 15. Applied Discrete Structures, https://discretemath.org/. License: CC BY-NC-SA: Attribution-NonCommercial-ShareAlike.