Search results
Russian Mathematics > 2019 > 63 > 5 > 57-62
Siberian Mathematical Journal > 2013 > 54 > 5 > 810-816
Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences) > 2010 > 45 > 3 > 151-161
Russian Mathematics > 2019 > 63 > 5 > 57-62
Siberian Mathematical Journal > 2013 > 54 > 5 > 810-816
Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences) > 2010 > 45 > 3 > 151-161