摘要: … Let G be ak critical graph with maximal path length I and classify the points of G as follows. A poilnt p is of type i provided it is the t-th point of some path and i is the largest number for …
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G. A. Dirac, Some Theorems on Abstract Graphs Proceedings of the London Mathematical Society. ,vol. s3-2, pp. 69- 81 ,(1952) , 10.1112/PLMS/S3-2.1.69