  The method of Lambda-operators developed by S. Derkachov, G. Korchemsky, A.
Manashov is applied to a derivation of eigenfunctions for the open Toda chain.
The Sklyanin measure is reproduced using diagram technique developed for these
Lambda-operators. The properties of the Lambda-operators are studied. This
approach to the open Toda chain eigenfunctions reproduces Gauss-Givental
representation for these eigenfunctions.
