1. D. E. Muller and W. S. Bartky, “A theory of asynchronous circuits,” International Symposium on the Switching Theory (Harvard University, 1959), pp. 204–243.
2. J. A. Brzozowski, Recent Adv. Formal Languages Appl. 25, 11–42 (2006).
3. O. P. Kuznetsov, N. I. Bazenkov, B. A. Boldyshev, L. Yu. Zhilyakova, S. G. Kulivets, and I. A. Chistopolsky, “An asynchronous discrete model of chemical interactions in simple neuronal systems,” Sci. Tech. Inf. Process. 45(6), 375–389 (2018).
4. L. Zhilyakova and D. Gubanov, “Double-threshold model of the activity spreading in a social network: The case of two types of opposite activities,” Proceedings of the 11th IEEE International Conference on Application of Information and Communication Technologies AICT2017 (2017), Vol. 2, pp. 267–270.
5. M. Minsky, Computation: Finite and Infinite Machines (Prentice Hall, Englewood Cliffs, N.J., 1967).