1. Convergence of Probability Measures;Billingsley,1968
2. Analysis of the M/M/C/K queue with exponential abandonment time;Brezinski,1991
3. Basic problems of telephone traffic theory and the influence of repeated calls;Cohen;Phillips Telecomm. Rev.,1957
4. Sur une théorie des répétitions des appels téléphoniques;LeGall;Ann. Telecomm.,1969
5. Asymptotics and Special Functions;Olver,1974