Lumen Learning. College Algebra | Sequences and Their Notations. License: CC BY: Attribution.
“CS202: Discrete Structures | Unit 1.” Saylor Academy. License: CC BY: Attribution.
Aspnes, James. (2022). Chapter 3. Notes on Discrete Mathematics. License: CC BY-SA: Attribution-ShareAlike.
Doerr, Al and Levasseur, Ken. (2024). Chapters 1, 4, and 8.2. Applied Discrete Structures, https://discretemath.org/. License: CC BY-NC-SA: Attribution-NonCommercial-ShareAlike.
Jamaloodee, Mohamed, et al. Chapters 5 and 11.1. Discrete Math. Georgia Gwinnett College, Accessed 19 January 2025. License: CC BY-NC: Attribution-NonCommercial.
Levin, Oscar. (2023). Chapters 0.3 and 2. Discrete Mathematics: An Open Introduction, https://discrete.openmathbooks.org/dmoi3/, 3rd edition. License: CC BY-SA: Attribution-ShareAlike.
Sassolas, Mathieu. (2021). Chapters IV and VI.A. Introduction to Discrete Mathematics: An OER for MA-471, https://academicworks.cuny.edu/qb_oers/179/. License: CC BY-NC: Attribution-NonCommercial.
Davis, Stephen. (2019). Chapter 2. A Cool Brisk Walk Through Discrete Mathematics, version 2.2. License: CC BY-SA: Attribution-ShareAlike.