Szlávi, Péter, László Zsakó, and Gábor Törley. “Programming Theorems Have the Same Origin”. Central-European Journal of New Technologies in Research, Education and Practice 1, no. 1 (August 26, 2019): 1-12. Accessed December 8, 2019. http://ojs.elte.hu/cejntrep/article/view/380.