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Lauffenburger, Olivier (2006). "supurgillu". The Hittite Grammar Homepage, Akkadian Dictionary. Archived from the original on 2007-09-27 – via premiumwanadoo.com.
Lauffenburger, Olivier (2006). "supurgillu". The Hittite Grammar Homepage, Akkadian Dictionary. Archived from the original on 2007-09-27 – via premiumwanadoo.com.
Lyle, Katie Letcher (2010) [first published 2004]. The Complete Guide to Edible Wild Plants, Mushrooms, Fruits, and Nuts: How to Find, Identify, and Cook Them (2nd ed.). Guilford, Connecticut: FalconGuides. p. 110. ISBN978-1-59921-887-8. OCLC560560606.