Book Erik Kwakkel; Francis Newton (2019)
Medicine at Monte Cassino: Constantine the African and the Oldest Manuscript of his Pantegni. (/isis/citation/CBB370036929/) unapi

Chapter Newton, Francis (2011)
Arabic Medicine and Other Arabic Influences in Southern Italy in the Time of Constantinus Africanus (saec. XI). In: Between Text and Patient: The Medical Enterprise in Medieval and Early Modern Europe (p. 25). (/isis/citation/CBB001251746/) unapi

Article Gibson, Craig A.; Newton, Francis (1995)
Pandulf of Capua's De calculatione: An illustrated abacus treatise and some evidence for the Hindu-Arabic numerals in 11th-century south Italy. Mediaeval Studies (pp. 293-335). (/isis/citation/CBB000067671/) unapi