Robert E. Jamison. Few slopes without collinearity. Discrete Mathematics, 60:199-206, 1986. [doi]
@article{Jamison86,
title = {Few slopes without collinearity},
author = {Robert E. Jamison},
year = {1986},
doi = {10.1016/0012-365X(86)90012-9},
url = {http://dx.doi.org/10.1016/0012-365X(86)90012-9},
tags = {e-science},
researchr = {https://researchr.org/publication/Jamison86},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {60},
pages = {199-206},
}