Peter Butkovic. Necessary solvability conditions of systems of linear extremal equations. Discrete Applied Mathematics, 10(1):19-26, 1985. [doi]
@article{Butkovic85,
title = {Necessary solvability conditions of systems of linear extremal equations},
author = {Peter Butkovic},
year = {1985},
doi = {10.1016/0166-218X(85)90056-3},
url = {http://dx.doi.org/10.1016/0166-218X(85)90056-3},
researchr = {https://researchr.org/publication/Butkovic85},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {10},
number = {1},
pages = {19-26},
}