Calculations on invariant density.

Calculations on the Pais Theory.

Calculations on different topics (spin 3/2, Dirac theory, matrix, ...).

Calculations by Pauli and others.

Calculations by Pauli and others.

Calculations on Vacuum Expectation values of Bilinear Forms in $\Psi,\widehat{\Psi}$ .

Calculations on Gürsey's formalism (matrix transformation).

Calculations, linked to a letter to W. Heisenberg.

Calculations.

Calculations.