J. M. Izar Landeta, J. A. Nájera Saldaña, and L. A. . Zárate Camacho, “Calculating the inventory of an item with normal demand and exponential delivery time”, HITOS, vol. 31, no. 90, pp. 226–244, Aug. 2025, doi: 10.19136/hitos.a31n90.6382.