For citations:

Lukin E.P., Kirillova S.L., Kirillov V.B. Substantiation of Cumulative Coefficient Characterizing Epidemic Typhus Fever Transmission Activity Depending on Seasons. Problems of Particularly Dangerous Infections. 2009;(3(101)):22-23. (In Russ.) https://doi.org/10.21055/0370-1069-2009-3(101)-22-23