S. Donev, Dynamical Coherence and Curvature Deformation View on Gravity (2023)

S. Donev, M. Tashkova, Generlized Parallelism and Field Equations (2022)

S. Donev, Dynamical Structure and Propagation of Spatially Finite Field Objects (2022)

S. Donev, M. Tashkova, Physical Aspects of the Geometry of Distributions on Space-time (2020)

S. Donev, M. Tashkova, Frobenius Curvature as Formal Image of a Implementer of Time-stable Local Dynamical Structure (2020)

S. Donev, M. Tashkova, On the Pre-metric Formulation and Nonlinearization of Charge-free Electrodynamics, Journal of Geometry and Symmetry in Physics (40) 1-24 (2015)

S. Donev, M. Tashkova, Electromagnetic field objects in terms of Balance of Geometric flows (2015)

S. Donev, M. Tashkova, Geometric View on Photon-like Objects, Lambert Academic Publishing (2014)

S. Donev, M. Tashkova, Relativistic Strain and Electromagnetic Photon-Like Objects (2014)

S. Donev, M. Tashkova, A nonlinear relativistic approach to mathematical representation of vacuum electromagnetism based on extended Lie derivative (2013)

S. Donev, M. Tashkova, A nonlinear prerelativistic approach to mathematical representation of vacuum electromagnetism (2013)

S. Donev, M. Tashkova, Energy-momentum Directed Nonlinearization of Maxwell’s Equations in the Case of a Continuous Madia, Proceedings of the Royal Society of London, Series A, Mathematical and Physical Sciences (443) 281-291 (1995)

S. Donev, M. Tashkova, Energy-momentum Directed Nonlinearization of Maxwell’s Pure Field Equations, Proceedings of the Royal Society of London, Series A, Mathematical and Physical Sciences (443) 301-312 (1993)

S. Donev, Autoclosed Differential Forms and (3+1)-Solitary Waves, Bulgarian Journal of Physics (15) 419-426 (1988)

S. Donev, A particular nonlinear generalization of Maxwell equations admitting spa-tially localized wave solutions, Proceedings of the Bulgarian Academy of Sciences, vol. 34, No. 4 (1986)