Tolong jelaskan mengenai Cathetan dari L. L. Zamenhof dalam bahasa jawa

Zamenhof, Esperanto's founder (in English) on lernu!, an Esperanto study portal

Zamenhof: The Life, Works, and Ideas of the Author of Esperanto by Aleksandr Korzhenkov – a 53 pages scholarly text abridged from a 2009 book (in English)