1. S. Sikdar. Drawing Finite State Machines in LaTeX using TikZ: A Tutorial, 2017.
2. M. Sipser. Introduction to the Theory of Computation. Thomsom/Course Technology, 2005. Pages 48–50.
3. T. Tantau, et al. The TikZ and PGF Packages: Manual for version 3.1.10, ch. Automata Drawing Library, pp. 571–575. 2023. https://ctan.org/pkg/pgf
4. TeX Stack Exchange. Difference between “right of=” and “right=of” in PGF/TikZ. https://tex.stackexchange.com/questions/9386.
5. TeX Stack Exchange. How is arc defined in TikZ? https://tex.stackexchange.com/questions/175016.