Opperdoes, F., & Steiger, RF. (1981). Localization of Hydrolases in Cultured Pro-cyclic Trypomastigotes of Trypanosoma-brucei. Molecular and Biochemical Parasitology, 4(5-6), 311-323. https://doi.org/10.1016/0166-6851(81)90063-3 (Original work published 1981)