"What is Mustard?". Saskatchewan Mustard Development Commission. Mustard Consumer Website. SMDC 2011. Web. 16 March 2016 <"The Mustard Site | What is Mustard?". Archived from the original on 2016-03-25. Retrieved 2016-03-16.>.
"What is Mustard?". Saskatchewan Mustard Development Commission. Mustard Consumer Website. SMDC 2011. Web. 16 March 2016 <"The Mustard Site | What is Mustard?". Archived from the original on 2016-03-25. Retrieved 2016-03-16.>.
Warchałowski, Andrzej (2003). Chrysomelidae: the leaf-beetles of Europe and the Mediterranean area. Warsawa: Natura Optima dux Foundation. ISBN978-83-918040-0-1. OCLC77850541.