GRUSZCZYŃSKI, Rafał and PIETRUSZCZAK, Andrzej. Space, points and mereology. On foundations of point-free Euclidean geometry. Logic and Logical Philosophy. Online. 30 November 2009. Vol. 18, no. 2, pp. 145-188. [Accessed 4 July 2024]. DOI 10.12775/LLP.2009.009.