POKERŽNIK, Helena. Music and Concentration. In: KOVAČIČ, Bojan (ed.). Širjenje obzorij o poučevanju glasbe. [s.l.] : University of Maribor Press,2025. p. 271–276. DOI: 10.18690/um.pef.3.2025.44. Disponível em: https://press.um.si/index.php/ump/catalog/book/960/chapter/542. Acesso em: 7 mar. 2026.