A. A. Isaac, U. P. Akra, and S. S. Akpan, “ON WHETHER A t- STEINER QUINTUPLE SYSTEM OF BALANCED INCOMPLETE BLOCK DESIGN IS A GROUP, RING OR FIELD ALGEBRA”, FJS, vol. 9, no. 12, pp. 241–246, Nov. 2025, doi: 10.33003/fjs-2025-0912-4082.