The Citron Compendium: The Citron (Etrog) Citrus medica L.: Science and Tradition

The Citron Compendium book

Peter Nahon & Jean-Paul Brigand. Gastronomy and the citron tree (Citrus medica L.). International Journal of Gastronomy and Food Science (2016).

Geetha's Kitchen: July 2010

The Citron (Citrus medica L.) in China

Etrog: Most Up-to-Date Encyclopedia, News & Reviews

The Exotic History of Citrus – Electrum Magazine

Genetic and chemical diversity of citron (Citrus medica L.) based on nuclear and cytoplasmic markers and leaf essential oil composition - ScienceDirect

The Exotic History of Citrus – Electrum Magazine

Etrog Citron Information and Facts

Plants of the Bible: Citron