Seidel, M., Lüttke, M., Cocquempot, C., Potts, K., Heeney, W. J., Husemann, M., (2021). BioRisk(16), 1-13. Pensoft Publishers, Sofia, Bulgaria. English language
Karasawa, S., Nakata, K., (2018). BioRisk(No.13), 53-76. Pensoft Publishers, Sofia, Bulgaria. English language
Samways, M. J., (2010). BioRisk(No.5), 73-84. PENSOFT Publishers, Sofia, Bulgaria. English language
Termaat, T., Kalkman, V. J., Bouwman, J. H., (2010). BioRisk(No.5), 155-173. PENSOFT Publishers, Sofia, Bulgaria. English language