1. Amaldi, E. (1966). La vita e l’opera di E. Majorana. Accademia dei Lincei, Roma.
2. Unified Field Theories: In the first third of the 20th century;Barbour,2011
3. From the Rise of the Group Concept to the Stormy Onset of Group Theory in the New Quantum Mechanics. A saga of the invariant characterization of physical objects, events and theories;Bonolis;Nuovo Cimento Rivista Serie,2004
4. Spinors in n dimensions;Brauer;American Journal of Mathematics,1935
5. The spinorial chessboard;Budinich,2012