Hartini S, Liliasari L, Sinaga P. Students’ problem solving skill in nuclear physics course through NPIRL. Momentum: Physics Education Journal [nternet]. 2023 Aug. 13 [cited 2024 Jul. 22];7(2):279-8. vailable from: http://ejournal.unikama.ac.id/index.php/momentum/article/view/8567