WILLIS, Raymond S., The Debt of the Spanish Libro de Alexandre to the French Roman d'Alexandre, Elliot Monographs, 33, Princeton, Princeton University Press, 1935.

WILLIS, Raymond S., «Mester de clerecía: a Definition of the Libro de Alexandre», Romance Philology, 10, (1956-1957), pp. 212-224.

WILLIS, Raymond S., «Mester de clerecía: a Definition of the Libro de Alexandre», Romance Philology, 10 (1956-1957), pp. 212-224.

WILLIS, Raymond S., «Mester de clerecía: a Definition of the Libro de Alexandre», Romance Philology, 10 (1956-57), pp. 212-24.

WILLIS, Raymond S., «The Artistry and Enigmas of the Libro de Alexandre: A Review Article», Hispanic Review, 42 (1974), pp. 33-42.

WILLIS, Raymond S., «The Artistry and Enigmas of the Libro de Alexandre: A Review Article», Hispanic Review, 42, (1974), pp. 33-42.

WILLIS, Raymond S., «The Artistry and Enigmas of the Libro de Alexandre: A Review Article», Hispanic Review, 42 (1974), pp. 33-42.

WILLIS, Raymond S., «In Search of the Lost Libro de Alexandre and Its Author: Review Article», Hispanic Review, 51.1 (1983), pp. 63-88.

WILLIS, Raymond S., «In Search of the Lost Libro de Alexandre and Its Author: Review Article», Hispanic Review, 51, (1983), pp. 63-88.

WILLIS, Raymond S., «In Search of the Lost Libro de Alexandre and Its Author: Review Article», Hispanic Review, 51 (1983), pp. 63-88.