Raszkowski, Tomasz, et al. “Influence of Grünwald-Letnikow Time and Space Temperature Derivative on Heat Distribution”. Bulletin de la Société Des Sciences et Des Lettres de Łódź, vol. 70, no. 1, Aug. 2021, pp. 97-113, https://journals.ltn.lodz.pl/Bulletin/article/view/1266.