Obukhov V.V., “Algebra of Symmetry Operators For Klein-Gordon-Fock Equation”, Symmetry-Basel, 13:4 (2021), 727
Obukhov V., “Hamilton-Jacobi Equation For a Charged Test Particle in the Stackel Space of Type (2.0)”, Symmetry-Basel, 12:8 (2020), 1289
Ivanov D.A. Breev A.I., “Noncommutative Integration of the Klein-Gordon Equation in Electromagnetic Fields Admitting Functional Arbitrariness”, Russ. Phys. J., 62:12 (2020), 2169–2179
Breev A.I., Mosman E.A., “Noncommutative Integration and Symmetry Algebra of the Dirac Equation on the Lie Groups”, Russ. Phys. J., 59:8 (2016), 1153–1163
A I Breev, A V Shapovalov, “The Dirac equation in an external electromagnetic field: symmetry algebra and exact integration”, J. Phys.: Conf. Ser., 670 (2016), 012015
А. И. Бреев, “Поляризация вакуума скалярного поля на однородных пространствах c инвариантной метрикой”, ТМФ, 178:1 (2014), 69–87 ; A. I. Breev, “Scalar field vacuum polarization on homogeneous spaces with an invariant metric”, Theoret. and Math. Phys., 178:1 (2014), 59–75
Breev A.I. Goncharovskii M.M. Shirokov I.V., “Klein-Gordon Equation with a Special Type of Nonlocal Nonlinearity in Commutative Homogeneous Spaces with Invariant Metric”, Russ. Phys. J., 56:7 (2013), 731–739
А. И. Бреев, И. В. Широков, А. А. Магазев, “Поляризация вакуума скалярного поля на группах Ли и однородных пространствах”, ТМФ, 167:1 (2011), 78–95 ; A. I. Breev, I. V. Shirokov, A. A. Magazev, “Vacuum polarization of a scalar field on Lie groups and homogeneous spaces”, Theoret. and Math. Phys., 167:1 (2011), 468–483
Гончаровский М.М., Широков И.В., “Классификация вырожденных решений линейных дифференциальных уравнений”, Известия высших учебных заведений. Физика, 54:5 (2011), 20–26 ; Goncharovskii M.M., Shirokov I.V., “Classification of Degenerate Solutions of Linear Differential Equations”, Russian Physics Journal, 54:5 (2011), 527–535
С. П. Барановский, И. В. Широков, “Продолжения векторных полей на группах Ли и однородных пространствах”, ТМФ, 135:1 (2003), 70–81 ; S. P. Baranovskii, I. V. Shirokov, “Prolongations of Vector Fields on Lie Groups and Homogeneous Spaces”, Theoret. and Math. Phys., 135:1 (2003), 510–519