Prokofiev, A.M. 2019. Two new species of Engertia Dalla Torre, 1913 and Philacelota Heller, 1900 from Indonesia and the Philippines with a revised identification key (Coleoptera: Scarabaeidae: Melolonthinae). European Journal of Taxonomy. 561 (Oct. 2019). DOI:https://doi.org/10.5852/ejt.2019.561.