Chau, N.N. and Anh, D.T. 2019. Three new species of the spiral nematode genus helicotylenchus steiner, 1945 (nematoda: hoplolaimidae) from Vietnam. Academia Journal of Biology. 41, 2 (Jun. 2019). DOI:https://doi.org/10.15625/0866-7160/v41n2.13597.