Helena Augusta : the mother of Constantine the Great and the legend of her finding of the true cross - Drijvers, Hendrik Jan Willem, <1934-2002>. (OLS)http://semarc/name/119687 (E. J. Brill,, 1992)
Testo rivisto della tesi, Storia antica, Groningen,1989
Bibliography, p. 197-211
Keywords: Elena <santa; imperatrice; ca. 248-329>. (OLS)http://semarc/subject/35981; Croce Santa - Leggende. (OLS)http://semarc/subject/55673