1 Friedman, John Block, "Trade, travel, and exploration in the Middle Ages" An Encyclopedia 2000
2 Komroff, Manuel, "The travels of Marco Polo" 1941
3 Rouleau, Francis A, "The Yangchow Latin tombstone as a landmark of medieval Christian in China" 17 : 346-365, 1954
4 Purtle, Jennifer, "The Far side: expatriate medieval art and its languages in Sino-Mongol China" Brill 2001
5 Lopez, Robert S, "Sue giù per la storia di Genova" 1975
6 Anastasius, P. van den Wyngaert, "Sinica Franciscana, vol. 1" Firenze 1929
7 Arnold, Lauren, "Princely gift and papal treasures" 1999
8 Rachewiltz, I. de, "Papal envoys to the great Khans" Faber &Faber 1971
9 Lopez, Robert S, "Nuove luci sugli Italiani in Estremo Oriente prima di Colombo" 3 : 337-398, 1951
10 Dawson, Christopher, "Mission to Asia" 1980
1 Friedman, John Block, "Trade, travel, and exploration in the Middle Ages" An Encyclopedia 2000
2 Komroff, Manuel, "The travels of Marco Polo" 1941
3 Rouleau, Francis A, "The Yangchow Latin tombstone as a landmark of medieval Christian in China" 17 : 346-365, 1954
4 Purtle, Jennifer, "The Far side: expatriate medieval art and its languages in Sino-Mongol China" Brill 2001
5 Lopez, Robert S, "Sue giù per la storia di Genova" 1975
6 Anastasius, P. van den Wyngaert, "Sinica Franciscana, vol. 1" Firenze 1929
7 Arnold, Lauren, "Princely gift and papal treasures" 1999
8 Rachewiltz, I. de, "Papal envoys to the great Khans" Faber &Faber 1971
9 Lopez, Robert S, "Nuove luci sugli Italiani in Estremo Oriente prima di Colombo" 3 : 337-398, 1951
10 Dawson, Christopher, "Mission to Asia" 1980
11 Olschki, Leonardo, "Marco Polo's Asia" 1960
12 Larner, John, "Marco Polo and the discovery of the world" Yale University Press 1999
13 Ashtor, E, "Levant trade in the Later Middle Ages" 1983
14 Bautier, R. H, "Les relations économiques des Occidentaux avec les pays d'Orient au Moyen Age" 1970
15 Petech, Luciano, "Les marchands italiens dans l'empire mongol" 250 : 549-574, 1962
16 Pegolotti, F. B, "La pratica dell mercatura" 1936
17 Lopez, Robert S, "European merchants in the Medieval Indies" 3 : 164-184, 1942
18 Airaldi, Gabriella, "Dall'Eurasia al nuovo mondo: una storia italiana (secc. XI-XVI)" Frilli 2007
19 Lopez, Robert S, "Comptes rendus des séances de l'académie des inscriptions et belles-lettres, series 4" 445-458, 1997
20 Moule, A. C, "Christians in China before the year 1550" 1930
21 Yule, Henry, "Cathay and the way thither: being a collection of medieval notices of China, vol. 2" The Hakluyt Society 1913
22 Balard, Michel, "Atti del Convegno internazaionale di Studi colombiani" 1974
23 Rudolph, Richard C, "A second fourteenth-century Italian tombstone in Yangchou" 13 (13): 133-136, 1975