Kolesnikov Ivan A. «Determining parameters of conformal mappings from the upper halfplane onto straight-line periodic polygons with double symmetry and onto circular periodic polygons» // Tomsk State University Journal of Mathematics and Mechanics 2019. №60 C.42-60
Alexandrov Igor Aleksandrovich «Torsion of an elastic rod with a multicircular cross-section» // 2010. №4(12) C.56-63