In the paper On the representation of the group $GL(n, K)$ where $K$ is a local field by Gelfand and Kazhdan, it is said that the proofs of the theorems in the paper are published in some other papers.
I tried to find these papers but not able to find them. Are there some papers (or lecture notes) which contain the proofs of the results in the paper On the representation of the group $GL(n, K)$ where $K$ is a local field?
Thank you very much.