Easdown, David and Saunders, Neil (2016) The minimal faithful permutation degree for a direct product obeying an inequality condition. Communications in Algebra, 44 (8). pp. 3518-3537. ISSN 0092-7872 (Print), 1532-4125 (Online) (doi:https://doi.org/10.1080/00927872.2015.1085548)