“Nematodes of the Order Rhabditida from Andalucía, Spain. The Family Panagrolaimidae, With a Compendium of Species of Panagrolaimus and a Key to Their Identification”. Journal of Nematode Morphology and Systematics, vol. 8, no. 2, Oct. 2009, p. 133/160, https://revistaselectronicas.ujaen.es/index.php/jnms/article/view/42.