Matrix Integrals, Toda Symmetries, Virasoro Constraints and Orthogonal Polynomials M. Adler, P. van Moerbeke (1995) Recherche Coopérative sur Programme n°25
Method of replacing the variables for generalized symmetry of the D'Alembert equation. Kotel'nikov, Gennadii A. (2002) International Journal of Mathematics and Mathematical Sciences
Monogenic functions in conformal geometry. Eastwood, Michael, Ryan, John (2007) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]