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"On Line Graphs with Crossing Number 1."
V. R. Kulli, D. G. Akka, Lowell W. Beineke (1979)
- V. R. Kulli, D. G. Akka, Lowell W. Beineke:
On Line Graphs with Crossing Number 1. J. Graph Theory 3(1): 87-90 (1979)
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