WEIZINGER, Sylvia; HEMMER, Ingrid. Students’ Conceptions on Circadian and Seasonal Cycles. Journal of Geography Education, [S. l.], v. 35, n. 4, p. 198–206, 2007. DOI: 10.60511/zgd.v35i4.219. Disponível em: https://www.zgd-journal.de/index.php/zgd/article/view/219. Acesso em: 18 may. 2026.