Zabidi, Y., Rengganis, E., Harliyus A, S, H. and R, F. K. (2025) “Application of ELECTRE and TOPSIS methods in selecting synthetic lubricating oil suppliers to minimize delays in aircraft maintenance activities ”, Enrichment : Journal of Management, 15(1), pp. 18-24. doi: 10.35335/enrichment.v15i1.2234.