CONTURSI, G. “Lineamenti Del Progetto Di Un Veicolo Per Una Missione Lunare Completa”. Annals of Geophysics 17, no. 1 (November 25, 1964): 1–18. Accessed April 29, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5193.