title = {Connection digraphs and second-order line digraphs.},
author = {Lowell W. Beineke and Christina Zamfirescu}, journal = {Discrete Mathematics}, number = {3}, pages = {237-254}, url = {http://dblp.uni-trier.de/db/journals/dm/dm39.html#BeinekeZ82}, volume = {39}, year = {1982}, description = {dblp}, ee = {http://dx.doi.org/10.1016/0012-365X(82)90147-9}, date = {2007-06-14},
keywords = {dblp }
::