For citations:
Berketov G.A., Mikrukov A.A., Tsurkin A.P. . Statistics and Economics. 2014;(1):138-143. (In Russ.) https://doi.org/10.21686/2500-3925-2014-1-138-143
Berketov G.A., Mikrukov A.A., Tsurkin A.P. . Statistics and Economics. 2014;(1):138-143. (In Russ.) https://doi.org/10.21686/2500-3925-2014-1-138-143