Kyrov Vladimir A. «The pseudo-Helmholtz and dual Helmholtz planes with the Finsler geometry» // Tomsk State University Journal of Mathematics and Mechanics 2016. №6(44) C.5-18
Kyrov Vladimir Alexandrovich «The properly helmholtz plane as Finsler geometry» // Tomsk State University Journal of Mathematics and Mechanics 2016. №4(42) C.15-22
