Letter from P. Gulmanelli to W. Pauli. Republication of "The theory of relativity".

Letter from P. Gulmanelli to W. Pauli linked to the publication of "The theory of relativity".

Calculations with some comments. "I have thought on the degeneracy of the vacuum and the mirror problem. Although I have not solved the problem I have made enough progress to justify the spinor model, I think."

Letter from P. Gulmanelli to W. Pauli linked to the publication of "The theory of relativity". Problems with copyright.

Circular about the discussion for the 3rd Zurich talks (18 to 21 April 1951).