Drambyan, A.K. and Mikaelyan, H.V. 2025. ON SEMISTRONG EDGE-COLORINGS OF OUTERPLANAR GRAPHS. Proceedings of the YSU A: Physical and Mathematical Sciences. 59, 2 (267) (Jun. 2025), 32–45. DOI:https://doi.org/10.46991/PYSUA.2025.59.2.032.