Potts model with invisible states: a review Mariana Krasnytska, Petro Sarkanych, Bertrand Berche, Yurij Holovatch and Ralph Kenna Eur. Phys. J. Spec. Top., 232 11 (2023) 1681-1691 Published online: 08 May 2023 DOI: 10.1140/epjs/s11734-023-00843-3