1. Anca T, Philippe V, Ilioara O, Mircea T (2009) Composition of essential oils of Viola tricolor and V. arvensis from Romania. Chem Nat Compd 45(1):91–92
2. Anonymous (2012) Edible flowers guide.
http://www.thompson-morgan.com/edible-flowers
3. Barash CW (1993) Edible flowers from garden to palate. Fulcrum Publishing, Golden
4. Behmanesh Y, Abdollahi M (2002) Haemolysis after consumption of Viola tricolor. WHO Drug Inform 16(1):15–16
5. Chevallier A (1996) The encyclopedia of medicinal plants. Dorling Kindersley, London, 336 pp