International telephone service imbalances
1991 ◽
Vol 15
(2)
◽
pp. 107-118
◽
Keyword(s):
1899 ◽
Vol 48
(1228supp)
◽
pp. 19688-19689
2000 ◽
Vol 24
(10-11)
◽
pp. 907-927
◽
1991 ◽
Vol 14
(4)
◽
pp. 68-76
Keyword(s):
1983 ◽
Vol 7
(1)
◽
pp. 53-63
◽
Transactions of the American Institute of Electrical Engineers Part I Communication and Electronics
◽
1961 ◽
Vol 80
(5)
◽
pp. 474-482
◽