Shurygin, V.V. and Shyrygin, V.V. 2021. Combining Methods of Euclidean, Affine, and Projective Geometries in Solving Geometric Problems . Russian Digital Libraries Journal. 24, 3 (Jul. 2021), 563-580. DOI:https://doi.org/10.26907/1562-5419-2021-24-3-563-580.