LOWER BOUNDS FOR THE RATE OF CONVERGENCE FOR CONTINUOUS-TIME INHOMOGENEOUS MARKOV CHAINS WITH A FINITE STATE SPACE Статья Zeifman A.I., Korolev V.Y., Satin Y.A., Kiseleva K.M. Statistics and Probability Letters. Elsevier B.V.. Том 137. 2018. С. 84-90
SERBIAN JOURNAL OF EXPERIMENTAL AND CLINICAL RESEARCH Журнал University of Kragujevac, Faculty of Science.