James F. Geelen, A. M. H. Gerards, Ajai Kapoor. The Excluded Minors for GF(4)-Representable Matroids. Journal of Combinatorial Theory, Series A, 79(2):247-299, 2000. [doi]
@article{GeelenGK00,
title = {The Excluded Minors for GF(4)-Representable Matroids},
author = {James F. Geelen and A. M. H. Gerards and Ajai Kapoor},
year = {2000},
doi = {10.1006/jctb.2000.1963},
url = {http://dx.doi.org/10.1006/jctb.2000.1963},
researchr = {https://researchr.org/publication/GeelenGK00},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {79},
number = {2},
pages = {247-299},
}