^J. Robinson Jancis Robinson's Guide to Wine Grapes pg 71 Oxford University Press 1996 ISBN0-19-860098-4
^J. Robinson, J. Harding and J. Vouillamoz Wine Grapes - A complete guide to 1,368 vine varieties, including their origins and flavours pgs 138 & 363 Allen Lane 2012 ISBN978-1-846-14446-2