Hikari provides citation information of the articles published in International Mathematical Forum available at the web page associated to the respective paper.
A non-linear system of parabolic type PDEs for epidemic models
International Mathematical Forum, Vol. 12, 2017, no. 18, 853-860
In many real-time strategy , first-person shooter , and role-playing video games, it is common for a group of possible weapons or unit types to interact in a rock–paper–scissors style, where each selection is strong against a particular choice, but weak against another, emulating the cycles in real world warfare (such as cavalry being strong against archers, archers being strong against pikemen, and pikemen being strong against cavalry  ). Such game mechanics can make a game somewhat self-balancing, and prevent gameplay from being overwhelmed by a single dominant strategy .  For example, the video game series Halo has been praised for such a balancing strategy, with snipers being dominant to shotguns , shotguns being dominant to pistols , and pistols being dominant to snipers.