M. V. Pedyash, D. K. Petrov, Y. G. Ponomarev, і H. Rakhimov, «Influence of finite lifetime of quasi-particles on the I(V) characteristics of break junctions based on high-T_c superconductors», Fiz. Nizk. Temp., вип. 18, вип. 6, с. 606–608, Чер 1992.