Yu. A. Davydov, A. L. Rozin, “On sojourn times for functions and stochastic processes”, Teor. Veroyatnost. i Primenen., 23:3 (1978), 650–654; Theory Probab. Appl., 23:3 (1979), 633–637
Yu. A. Davydov, A. L. Rozin, “On a characterization of certain families of measures”, Teor. Veroyatnost. i Primenen., 23:1 (1978), 134–136; Theory Probab. Appl., 23:1 (1978), 130–132