Philippe Bourrinet, "The Marx-Lenin-Luxemburg Front", extract from Philippe Bourrinet, Dutch and German Communist Left on the Le Bataille socialiste website (accessed 2008-08-13)
loc.gov
lccn.loc.gov
Poretsky, Elisabeth K. Our Own People: A Memoir of "Ignace Reiss" and His Friends. Londres: Oxford University Press, 1969, p. 1–2 (Letter), 7–26 (Childhood), 27–36 (Polish Party), 37–52 (Lwow), 53–71 (Berlin/Vienna), 72-85 (Prague/Amsterdam), 86-129 (Moscow), 103-107 (Richard Sorge), 130-155 (Europe), 156-207 (Moscow), 208-226 (Switzerland), 243-270 (Afterward), 271-274 (Epilogue).