Fernando Bermejo Rubio
Robert Service
Mari Paz Balibrea
John Merriman
Stephen F. Cohen
Samuel H. Baron
Finkelstein Israel, Silberman Niel Asher
Christopher Hill
Sheila Fitzpatrick
Alejandro Lillo
Geoffrey Parker
Pedro Angel Fernandez Vega
Olwen Hufton
Julian Sanz, Jose Babiano
Georges Duby
Marcos Roitman Rosenmann
Holmes George
Joan E. Garcés
Rude George
John Reed
Hale J.R.
Leon Trotski, Nikolai Bujarin, Grigori Zinoviev
Stedman Jones Gateth
Rosa Luxemburgo
Gonzalo Puente Ojea