Zonov Matvey N., Timoshenko Egor A. «On the standard form for matrices of order two» // Tomsk State University Journal of Mathematics and Mechanics 2019. №59 C.5-10
Gaidak Violetta A., Timoshenko Egor A. «Involutions of the general linear group GL2 over a subring of the field Q» // Tomsk State University Journal of Mathematics and Mechanics 2019. №62 C.19-26