Chobanov DPetrov, Grzywacz B, Iorgu I?tefan, et al. Review of the Balkan Isophya (Orthoptera: Phaneropteridae) with particular emphasis on the Isophya modesta group and remarks on the systematics of the genus based on morphological and acoustic data.  2013. Available at: http://biotaxa.org/Zootaxa/issue/view/zootaxa.3658.1.

Ivkovi? S, Iorgu I?tefan, Horvat L, et al. New data on the bush-cricket Montana medvedevi (Orthoptera: Tettigoniidae), critically endangered in Europe (EU 28), and a comparison of its song with all known song patterns within the genus. Zootaxa. 2017;4263(3):527-542.

Iorgu I?tefan, Chobanov DPetrov, Iorgu EIulia. The unexpected finding of Parapholidoptera castaneoviridis in south-eastern Romania (Insecta, Orthoptera, Tettigoniidae). ZooKeys. 2017;643:87 - 96. Available at: http://zookeys.pensoft.net/articles.php?id=10645.