Lundqvist, J., K. Svensson, K. Ljung, U. Eriksson, and M. Eriksson. “A Phenomenographic Analysis Of Students’ Experience Of Geological Time”. Journal of Astronomy &Amp; Earth Sciences Education, vol. 8, no. 1, June 2021, https://journals.modernsciences.org/index.php/JAESE/article/view/45.