(1998) N-LIMIT OF A SPECTRAL GAP OF RANDOM WALKS ASSOCIATED WITH COMPLETE GRAPHS (1994) ON STRONG ERGODICITY FOR NONHOMOGENEOUS CONTINUOUS-TIME MARKOV-CHAINS (1995) ON THE ESTIMATION OF PROBABILITIES FOR BIRTH AND DEATH PROCESSES (1989) PROPERTIES OF A SYSTEM WITH LOSSES IN THE CASE OF VARIABLE RATES (1991) QUALITATIVE PROPERTIES OF INHOMOGENEOUS BIRTH AND DEATH PROCESSES (1991) SOME ESTIMATES OF THE RATE OF CONVERGENCE FOR BIRTH AND DEATH PROCESSES (1985) STABILITY FOR CONTINUOUS-TIME NONHOMOGENEOUS MARKOV-CHAINS (1998) STABILITY OF BIRTH-AND-DEATH PROCESSES (1997) THE DECAY FUNCTION OF NONHOMOGENEOUS BIRTH-DEATH PROCESSES, WITH APPLICATION TO MEAN-FIELD MODELS (1995) UPPER AND LOWER BOUNDS ON THE RATE OF CONVERGENCE FOR NONHOMOGENEOUS BIRTH AND DEATH PROCESSES | 
