Moshe Dror, Helman Stern, Pierre Trudeau. Postman tour on a graph with precedence relation on arcs. Networks, 17(3):283-294, 1987. [doi]
@article{DrorST87,
title = {Postman tour on a graph with precedence relation on arcs},
author = {Moshe Dror and Helman Stern and Pierre Trudeau},
year = {1987},
doi = {10.1002/net.3230170304},
url = {http://dx.doi.org/10.1002/net.3230170304},
researchr = {https://researchr.org/publication/DrorST87},
cites = {0},
citedby = {0},
journal = {Networks},
volume = {17},
number = {3},
pages = {283-294},
}