Frank De Clerck, N. L. Johnson. Subplane covered nets and semipartial geometries. Discrete Mathematics, 106-107:127-134, 1992. [doi]
@article{ClerckJ92,
title = {Subplane covered nets and semipartial geometries},
author = {Frank De Clerck and N. L. Johnson},
year = {1992},
doi = {10.1016/0012-365X(92)90539-R},
url = {http://dx.doi.org/10.1016/0012-365X(92)90539-R},
researchr = {https://researchr.org/publication/ClerckJ92},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {106-107},
pages = {127-134},
}