@Article{ authors = " Jerzy Strzelczyk, John Bock Friedman, Kristen Mossler Figg, Scott D. Westrem, Gregory G. Guzman", title = ""Trade, Travel and Exploration in the Middle Ages : an Encyclopedia", ed. John Bock Friedman, Kristen Mossler Figg, associate ed. Scott D. Westrem, coll. ed. Gregory G. Guzman, New York-London 2000 : [recenzja] / J. S.", journal = "Studia Źródłoznawcze. Commentationes", issue = "2001 / Tom 39", pages = "221 - 222" }

@Article{ authors = " Jerzy Strzelczyk, Gregory G. Guzman", title = ""The Vinland Map controversy and the discovery of a second version of the Tartar Relation : the authenticity of the 1339 text", Gregory G. Guzman, "Terrae Incognitae", R: XXXVIII, 2006 : [recenzja] / J.S.", journal = "Studia Źródłoznawcze. Commentationes", issue = "2008 / Tom 46", pages = "194 - 195" }