Thanh, N. V., N. D. Tu, V. G. Gagarin, A. V. Tchesunov, and N. T. Hien. “Two New Species of the Genus Ptycholaimellus Cobb, 1920 (Nematoda: Chromadoridae) from Coastal Zone of North Vietnam Sea”. Academia Journal of Biology, vol. 34, no. 4, Jan. 2013, pp. 408-13, doi:10.15625/0866-7160/v34n4.2675.