Pseudo-orthogonal groups and integrable dynamical systems in two dimensions
Pseudo-potentials, nonlocal symmetries and integrability of some shallow water equations
Psi-Series Solution of Fractional Ginzburg-Landau Equation
Pulsation and Precession of the Resonant Swinging Spring
Pure quantum integrability
Purely nonlocal Hamiltonian formalism for systems of hydrodynamic type