Jun, Y.B., Khan, M., Smarandache, F. and Song, S.-Z. 2020. Length Neutrosophic Subalgebras of BCK=BCI-Algebras . Bulletin of the Section of Logic. 49, 4 (Dec. 2020), 377–400. DOI:https://doi.org/10.18778/0138-0680.2020.21.