Pierre Fraisse, Pavol Hell, David G. Kirkpatrick. f-factors in directed and undirected multigraphs. Graphs and Combinatorics, 2(1):61-66, 1986. [doi]
@article{FraisseHK86,
title = {f-factors in directed and undirected multigraphs},
author = {Pierre Fraisse and Pavol Hell and David G. Kirkpatrick},
year = {1986},
doi = {10.1007/BF01788078},
url = {http://dx.doi.org/10.1007/BF01788078},
researchr = {https://researchr.org/publication/FraisseHK86},
cites = {0},
citedby = {0},
journal = {Graphs and Combinatorics},
volume = {2},
number = {1},
pages = {61-66},
}