found: Kamus pelajar Simalungun-Indonesia, 2016:summary (dictionary in Simalungun language)
found: Online ethnologue, November 15, 2017(Batak Simalungun language; alternate name: Simelungan, Timur; spoken in Sumatera Utara province: Deli Serdang, Kota Pematang Siantar, Serdang Bedagai, and Simalungun regencies)
found: Wikipedia, The Free Encyclopedia, viewed November 15, 2017(Simalungun, or Batak Simalungun, is an Austronesian language of Sumatra. It is spoken mainly in Simalungun Regency and Pematang Siantar, North Sumatra, Indonesia)