Paul de Kruif: (2002 reprint) ISBN 978-0-15-602777-9 Nordenskiöld, E. P. 1935 [Spallanzani, L.] . 247-248 Rostand, J.: 1997, , Torino, Einaudi. Conci, C. & Poggi R.: 1996 Iconography of Italian Entomologists, with essential biographical data. . 75 159-382. Gibelli, V.: 1971 . Pavia. Lhoste, J.: 1987 . INRA (Institut National de la Recherche Agronomique), Paris. Osborn, H.: 1946 . Columbus, Ohio, Published by the Author. Osborn, H.: 1952 .Columbus, Ohio, The Spahr & Glenn Company.