● Vandekerckhove TT,Willems A,Gillis M,Coomans A (2000). Occurrence of novel verrucomicrobial species, endosymbiotic and associated with parthenogenesis in Xiphinema americanum-group species (Nematoda, Longidoridae). Int. J. Syst. Evol. Microbiol.50, 2197-205.
