MARTÍNEZ VELASCO, A.; FERNÁNDEZ AGÜERO, L. The "Signum Equitum" of El Otero (Rueda de Pisuerga, Prov. Palencia,Spain) and the "Signa Equitum" of the Historical Cantabria. Complutum, v. 28, n. 1, p. 203–218, 22 Dec.2017 https://doi.org/10.5209/CMPL.58419.