MALINAUSKAS, R.; AKELAITIS, A. The Optimism Expression for Middle School Age Students in Physical Education Classes. Baltic Journal of Sport and Health Sciences, [S. l.], v. 4, n. 99, 2018. DOI: 10.33607/bjshs.v4i99.100. Disponível em: https://journals.lsu.lt/baltic-journal-of-sport-health/article/view/100. Acesso em: 19 apr. 2021.