Sae-teng, A., Pongmalai, P., Rattanakaruna, S., Yuenyang, T. and Nopharatana, A. 2026. Solid-state Fermentation of Palm Kernel Cake Using Two Bacillus Strains in Co-culture for Probiotics Production. Science and Engineering Connect. 49, 2 (Jun. 2026), 108–122.