Kahrs, M., & Hardy, A. (2021). Tymshare's Changes to the Project Genie SDS-940 Operating System: A Historical Review. IEEE ANNALS OF THE HISTORY OF COMPUTING, 43(3), 57-66.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/MAHC.2021.3099756.
Kahrs, M., & Hardy, A. (2021). "Tymshare's Changes to the Project Genie SDS-940 Operating System: A Historical Review" (vol 43, pg 57, 2021). IEEE ANNALS OF THE HISTORY OF COMPUTING, 43(4), 111.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/MAHC.2021.3122032.