J. B. . Ndayambaje, E. . Bikorimana, and F. . Nsanganwimana, “Factors contributing to the students’ poor performance in biology subject: A case study of ordinary level in rural secondary schools of Rwamagana district”, GSC Biol. Pharm. Sci., vol. 15, no. 3, pp. 249–261, Jun. 2021.