E. M. Parker; R. J. Hayward (1985), “madu”, inAn Afar-English-French dictionary (with Grammatical Notes in English), University of London,→ISBN
Mohamed Hassan Kamil (2015),L’afar: description grammaticale d’une langue couchitique (Djibouti, Erythrée et Ethiopie)[1], Paris: Université Sorbonne Paris Cité (doctoral thesis)
“madu”, inBalinese–Indonesian Dictionary[Kamus Bahasa Bali–Indonesia] (in Balinese), Denpasar, Indonesia: The Linguistic Center of Bali Province[Balai Bahasa Provinsi Bali]
Madu is commonly used for larger, poisonous snakes, whereas smaller snakes, that are native to Estonia, such as aviper or agrass snake are referred to asuss.
“madu”, in[EKSS] Eesti keele seletav sõnaraamat [Descriptive Dictionary of the Estonian Language] (in Estonian) (online version), Tallinn: Eesti Keele Sihtasutus (Estonian Language Foundation),2009
Edi Sedyawati et al. (1994).Kosakata Bahasa Sanskerta dalam Bahasa Melayu Masa Kini. Jakarta, Indonesia: Pusat Pembinaan dan Pengembangan Bahasa Departemen Pendidikan dan Kebudayaan Republik Indonesia. pp. 73–4.
Pijnappel, Jan (1875), “مادو madoe”, inMaleisch-Hollandsch woordenboek, John Enschede en Zonen, Frederik Muller, pages126-7
Wilkinson, Richard James (1901), “مادو madu”, inA Malay-English dictionary, Hong Kong: Kelly & Walsh limited, page633
Wilkinson, Richard James (1932), “madu”, inA Malay-English dictionary (romanised), volume II, Mytilene, Greece: Salavopoulos & Kinderlis, pages84-5