The number of directions determined by less than q points.

MLA

Fancsali, Szabolcs, et al. “The Number of Directions Determined by Less than q Points.” Journal of Algebraic Combinatorics, vol. 37, no. 1, Feb. 2013, pp. 27–37. EBSCOhost, https://doi.org/10.1007/s10801-012-0357-1.

APA

Fancsali, S., Sziklai, P., & Takáts, M. (2013). The number of directions determined by less than q points. Journal of Algebraic Combinatorics, 37(1), 27–37. https://doi.org/10.1007/s10801-012-0357-1

Chicago

Fancsali, Szabolcs, Peter Sziklai, and Marcella Takáts. 2013. “The Number of Directions Determined by Less than q Points.” Journal of Algebraic Combinatorics 37 (1): 27–37. doi:10.1007/s10801-012-0357-1.