Analogues of coverings and the fundamental group for the category of partial differential equations

Notes on symmetries of PDEs and Poisson structures

Symmetry-invariant solutions of PDEs and their generalizations

Generalized Landau-Lifshitz systems and Lie algebras associated with higher genus curves

Algebras and algebraic curves associated with PDEs and Backlund transformations

Infinite-dimensional Lie algebras associated with higher genus curves and generalized Landau-Lifshitz systems