For citations:

Onishchenko G.G., Patyashina M.A., Udovichenko S.K., Toporkov A.V., Toporkov V.P., Kutyrev V.V. Concerning Two-Level Structure of Potential Epidemic Hazard of the Mass Events with International Participation. Problems of Particularly Dangerous Infections. 2015;(1):5-9. (In Russ.) https://doi.org/10.21055/0370-1069-2015-1-5-9