Abdurrahman, S., M. Idris, F. Faisal, N. Hijriati, T. Thresye, and A. S. Lestia. “LEVEL SOFT GROUP AND ITS PROPERTIES”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, Vol. 19, no. 3, July 2025, pp. 2263-74, doi:10.30598/barekengvol19iss3pp2263-2274.