1. Schabel, De effectibus veneni radic. Veratri albi et Hellebori nigri. Tubing. 1817.
2. Andral, Journal de phys. expérim. de Magendie 1821.
3. Magendie, Formulaire 1835.
4. Bardsley, Hospit. facts and observations. London 1829.
5. Turnbull, An investigations into the remarcable medicinal effects resulting from the external app. of Veratria. London 1834.