Dioscorides (1902), "Sagapenum", in Julius Berendes (ed.), De materia medica(PDF), PharmaWiki.ch, p. 192, archived from the original(PDF) on 2015-09-24, retrieved 2014-10-10
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Dioscorides (1902), "Sagapenum", in Julius Berendes (ed.), De materia medica(PDF), PharmaWiki.ch, p. 192, archived from the original(PDF) on 2015-09-24, retrieved 2014-10-10