Lee 2014. Lee, James R. (May 22, 2014). "Lecture 16"(PDF). CSE431: Introduction to Theory of Computation. University of Washington. Archived(PDF) from the original on November 29, 2021. Retrieved October 5, 2022.
Lee 2014. Lee, James R. (May 22, 2014). "Lecture 16"(PDF). CSE431: Introduction to Theory of Computation. University of Washington. Archived(PDF) from the original on November 29, 2021. Retrieved October 5, 2022.