Hazir S, Keskin N, Schumann P, Lang E, Ehlers R, Stackebrandt E
(2004).
Two new Subspecies of Photorhabdus luminescens, Isolated from Heterorhabditis bacteriophora (Nematoda: Heterorhabditidae): Photorhabdus luminescens subsp. kayaii subsp. nov. and Photorhabdus luminescens subsp. thracensis subsp. nov.