Guide, B.A. et al. 2016. Glycerol as a cryoprotectant agent to the entomopathogenic nematodes Heterorhabditis spp. and Steinernema spp. Semina: Ciências Agrárias. 37, 5 (Oct. 2016), 3017–3026. DOI:https://doi.org/10.5433/1679-0359.2016v37n5p3017.