Maciejak, A., and M. Kosmala. “Kale (Brassica OleraceaL. Var. Acephala) As a Source of Dietary Fibre”. Biotechnology and Food Science, Vol. 83, no. 2, Dec. 2019, pp. 135-42, doi:10.34658/bfs.2019.83.2.135-142.