N. Sakuma, N. Aiba, M. Kawamura, R. Katayama, and H. Takao, “THE CURRENT SITUATION OF MASTICATORY BEHAVIOR OF FIRST GRADER AT ELEMENTARY SCHOOL: A RELATIONSHIP BETWEEN MASTICATORY ABILITY AND STUDENTS’ LIKES AND DISLIKES”, pijss, vol. 6, no. 2, pp. 193–207, Jul. 2020.