@book{ BA12546355, author = "Papoulis, Athanasios", title = "Probability, random variables, and stochastic processes", publisher = "McGraw-Hill", year = "1991", edition = "3rd ed", series = "McGraw-Hill series in electrical engineering", number = ". Communications and signal processing", URL = "https://ci.nii.ac.jp/ncid/BA12546355" }