2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54446Two approaches concerning the connection of the fermionic kappa -- symmetry with the superstring world -- sheet superdiffeomorphism transformations are discussed. The first approach is based on the twistor -- like formulation of the superstring action and the second one on a reformulation of the superstring and super~-~p~-~brane actions according to the Generalized Action Principle.10 pages. LATEX. Submitted to Proc. of the "SUSY-95" International Conference, Paris, France, 1995, May 15-19High Energy Physics - Theorytext