Volkova 1987. [Spiral nematodes of the genus Helicotylenchus Steiner 1945 from softwood rhizospheres in the southern Far East of Russia.] Mamaev, Yu.L.[Ed]. [Helminths and diseases caused by them.], Dal'nevostochnii Nauchnii Tsentr, Vladivostok, 1987: 1-128. Chapter pagination: 115-122, 128