From Virasoro constraints in Kontsevich's model to W-constraints in asymmetric 2-matrix model
Marshakov A., Mironov A., Morozov A.
The Ward identities in Kontsevich-iike 1-matrix models are used to prove at the level of discrete matrix models the suggestion of Gava and Narain, which relates the degree of potential in 2-matrix model to the form of "^-constraints imposed on its partition function.