Anh, Nguyen Duc, and Petra Sierwald. “Distribution and Descriptive Characteristics of the Two Giant Pill Millipedes of the Genus <i> Sphaerobelum </I> Verhoeff, 1924 (Diplopoda, Sphaerotheriida, Zephroniidae) in Vietnam”. Academia Journal of Biology 41, no. 1 (March 28, 2019). Accessed January 27, 2022. https://vjs.ac.vn/index.php/vjbio/article/view/11400.