Adam UA, Owolabi T, Lameed S, Ubaka C, Joy AT. Decoding Difficulty: A Quantitative Analysis of Difficult Concept in the Biology Curriculum. JES [Internet]. 2024 Oct. 24 [cited 2025 Oct. 5];8(4):570-81. Available from: https://jes.ejournal.unri.ac.id/index.php/JES/article/view/98