The Bell System Technical Journal
The Bell System Technical Journal > 1977 > 56 > 2 > 289 - 312
The Bell System Technical Journal > 1977 > 56 > 2 > 255 - 287
The Bell System Technical Journal > 1977 > 56 > 2 > 181 - 205
The Bell System Technical Journal > 1977 > 56 > 2 > 119 - 134
The Bell System Technical Journal > 1977 > 56 > 2 > 237 - 254
The Bell System Technical Journal > 1977 > 56 > 2 > 207 - 236
The Bell System Technical Journal > 1977 > 56 > 2 > 135 - 179