Holmyard, Eric John (1990) Alchemy Courier Dover Publications. p. 53. ISBN 0-486-26298-7.
europa.eu
eur-lex.europa.eu
Regulation (EC) No 110/2008 on the definition, description, presentation, labelling and the protection of geographical indications of spirit drinks Regulation (EC) No 110/2008 Annex II paragraph 6 (grape marc spirit) and Annex III (geographical indications)
google.ge
books.google.ge
Forbes, Robert James (1970). A short history of theArt of Distillationfrom the beginnings up to the death of Cellier Blumenthal. BRILL. pp. 57, 89. ISBN 978-90-04-00617-1. Retrieved 29 June 2010