@article{Pervuninski_1999 author = {S. M. Pervuninski and R. M. Didkovski}, title = {Two-Dimensional Cumulant Functions of Phase-Modulated Signals and their Spectra}, journal = {Telecommunications and Radio Engineering}, issn = {0040-2508}, year = {1999}, volume = {53}, number = {9-10}, pages = {23--30} }