See:
- Egami, N. and T. Sono , Marv Dasht, Vol. II, The Excavations of Tall i-Gap, 1959. The Institute of Oriental Culture, The University of Tokyo, 1962
- Yoshihiro Nishiaki, Prehistoric Pottery from the Marv Dasht Plain, Iran, -http://umdb.um.u-tokyo.ac.jp/DKoukoga/Marv_Dasht_Plain/about.php?-link=about