Reiner Kolla, Paul Molitor. A note on hierarchical layer-assignment. Integration, 7(3):213-230, 1989. [doi]
@article{KollaM89,
title = {A note on hierarchical layer-assignment},
author = {Reiner Kolla and Paul Molitor},
year = {1989},
doi = {10.1016/0167-9260(89)90002-3},
url = {http://dx.doi.org/10.1016/0167-9260(89)90002-3},
researchr = {https://researchr.org/publication/KollaM89},
cites = {0},
citedby = {0},
journal = {Integration},
volume = {7},
number = {3},
pages = {213-230},
}