1. Onishchenko G.G., Kutyrev V.V., editors. [Natural Plague Foci in the Territory of Caucasus, Caspian-Sea Region, Central Asia and Siberia]. Moscow: “Meditsina”; 2005. 192 p.
2. Soldatkin I.S., Rudenchik Yu.V., Efimov S.V. [Epizootic process in the natural foci of plague (the review of data and audit of the concept)]. In: [Issues of Parasitology and Non-Specific Prevention of zoonoses]. Saratov; 1988. P. 83-134.
3. Popov N.V., Sludsky A.A., Udovikov A.I., Anikin V.V., Yakovlev S.A., Karavaeva T.B. [Concerning the role of nematodes (Secernentea, Rhabdidae) - flea parasites in plague enzootics]. Entomologicheskie i Parazitologicheskie Issledovaniya v Povolzhie [Entomological and Parasitological Studies in Volga River Basin]. 2006; 5:88-92.
4. Darby C. Uniquely insidious: Yersinia pestis biofilms. Trends Microbiol. 2008; 16(4):158-64. DOI: 10.1016/j.tim.2008.01.005.
5. Hinnebusch B., Erickson D. Yersinia pestis biofilm in the flea vector and its role in the transmission of plague. Curr. Top. Microbiol. Immunol. 2008; 322:229-48. DOI: 10.1007/978-3-540-75418-311.