Agatha, S., & Simon, P. (2012). On the Nature of Tintinnid Loricae (Ciliophora: Spirotricha: Tintinnina): a Histochemical, Enzymatic, EDX, and High-resolution TEM Study. Acta Protozoologica, 51(1), 1-19. doi:10.4467/16890027AP.12.001.0384.