See:
- Grammion in: Paulys Realencyclopädie der classischen Altertumswissenschaft. Band VII,2 (1912), Sp. 1812 - https://ia600302.us.archive.org/12/items/PWRE14/Pauly-Wissowa_VII2_1811.png
- Antonis Thomas Vasilakis, The 147 cities of Ancient Crete -http://www.kairatos.com.gr/myweb/ancientcitiesdion-grammion.htm
- Stephanus of Byzantium, Etnika
