Download current issue of “Complex Systems” Volume 29, Number 1 (2020) : https://www.complex-systems.com/current/
Universality of Wolfram’s 2, 3 Turing Machine 
Alex Smith
Max-Plus Generalization of Conway’s Game of Life
Kotaro Sakata, Yuta Tanaka, and Daisuke Takahashi
Automatization of Universal Cellular Automaton Discoveries: A New Approach to Stream Duplication
Emmanuel Sapin
An Agent-Based Model of COVID-19
Christopher Wolfram