The Ecole Glossary: Anastasia - Short article on the saint, by Karen Rae Keck. - http://www2.evansville.edu/ecoleweb/glossary/anastasia.html
Anastasia, Saint - Brief biographical entry in the Columbia Encyclopedia gives feast days in both East and West. - http://www.bartleby.com/65/an/AnastasSt.html
St. Anastasia - Article in the Catholic Encyclopedia on this martyr, whose feast day is 25 December. Attracted a cultus at Rome in the late fifth century, and a sixth-century legend makes her a Roman matron, though martyred elsewhere. - http://www.newadvent.org/cathen/01453a.htm