Daribayev, B. S., D. V. Lebedev, and D. Z. Akhmed-Zaki. “Implementation of A Parallel Algorithm to Extract N-Gram from Text in a Functional Language”. Journal of Mathematics, Mechanics and Computer Science, vol. 107, no. 3, Sept. 2020, pp. 47-56, doi:10.26577/JMMCS.2020.v107.i3.05.