P.I Holod, S Pakuliak, “On a superextension of the Kadomtsev-Petviashvili equation”, Physics Letters A, 147:4 (1990), 184
Boris A. Kupershmidt, “Factorization of quasiclassical integrable systems”, Physica D: Nonlinear Phenomena, 44:3 (1990), 565
E.D.van der Lende, H.G.J. Pijls, “Super Hamiltonian operators and Lie superalgebras”, Indagationes Mathematicae, 1:2 (1990), 221
Frank B. Estabrook, Partially Intergrable Evolution Equations in Physics, 1990, 413
Walter Strampp, Walter Oevel, “Recursion operators and Hamiltonian structures in Sato's theory”, Lett Math Phys, 20:3 (1990), 195
I Bakas, A C Kakas, “Extended conformal symmetries and U(1) currents”, J. Phys. A: Math. Gen., 22:9 (1989), 1451
J Gibbons, B A Kupershmidt, “Kinetic representation of discrete integrable systems”, J. Phys. A: Math. Gen., 22:13 (1989), L559
I. Bakas, “Hamiltonian reduction and conformal symmetries in two dimensions”, Physics Letters B, 219:2-3 (1989), 283
I. M. Ivochkina, “Description of the algebraic structure of second-order differential operators that can be represented in divergence form”, J Math Sci, 45:3 (1989), 1117
Yoshihide Watanabe, “A Hamilton formalism for evolution equations with odd variables”, Annali di Matematica pura ed applicata, 154:1 (1989), 127