Phillip G. Bradford, David A. Thomas. Labeled shortest paths in digraphs with negative and positive edge weights. ITA, 43(3):567-583, 2009. [doi]
@article{BradfordT09,
title = {Labeled shortest paths in digraphs with negative and positive edge weights},
author = {Phillip G. Bradford and David A. Thomas},
year = {2009},
doi = {10.1051/ita/2009011},
url = {http://dx.doi.org/10.1051/ita/2009011},
researchr = {https://researchr.org/publication/BradfordT09},
cites = {0},
citedby = {0},
journal = {ITA},
volume = {43},
number = {3},
pages = {567-583},
}