F. Schubert y M. Schubert, «Metrological research into the foot measurement found in the celtic oppidum of Manching», Complutum, vol. 4, p. 227, ene. 1993, Accedido: nov. 14, 2024. Disponible en: https://revistas.ucm.es/index.php/CMPL/article/view/CMPL9393120227A