FIXED POINT THEOREMS FOR MULTIVALUED MAPPINGS IN MODULAR B-METRIC SPACES - Hartono, Hartono; Harini, Lusi; Hayati, Afifah; Mas’ud, Syamsudin; Yusri, Thesa Adi Saputra; Karyati, Karyati; Saptaningtyas, Fitriana Yuli (BAREKENG: Jurnal Ilmu Matematika dan Terapan, 2026)