Ulrich Faigle, Walter Kern. Computational Complexity of Some Maximum Average Weight Problems with Precedence Constraints. Operations Research, 42(4):688-693, 1994. [doi]
@article{FaigleK94,
title = {Computational Complexity of Some Maximum Average Weight Problems with Precedence Constraints},
author = {Ulrich Faigle and Walter Kern},
year = {1994},
doi = {10.1287/opre.42.4.688},
url = {http://dx.doi.org/10.1287/opre.42.4.688},
researchr = {https://researchr.org/publication/FaigleK94},
cites = {0},
citedby = {0},
journal = {Operations Research},
volume = {42},
number = {4},
pages = {688-693},
}