3 citations to https://www.mathnet.ru/eng/sigma1234
  1. Alexander G Rasin, Jeremy Schiff, “Symmetry structure of integrable hyperbolic third order equations”, J. Phys. A: Math. Theor., 56:48 (2023), 485204  crossref
  2. S. Ya. Startsev, “Symmetry Drivers and Formal Integrals of Hyperbolic Systems of Equations”, J. Math. Sci. (N. Y.), 252:2 (2021), 232–241  mathnet  crossref  mathscinet
  3. Startsev S.Ya., “Relationships Between Symmetries Depending on Arbitrary Functions and Integrals of Discrete Equations”, J. Phys. A-Math. Theor., 50:50 (2017), 50LT01  crossref  mathscinet  zmath  isi