1971  Bogolovskii, p.33: Left bank, b) 700 m north of locality described by Kolotukhina, 1938, p.672: east
               part of syncline at Itazu hill.
     2005  Nikolaeva & Bogoslovskii: 37: Itazu 2: Section 800 m N of hilltop Itazu and 700 m N of outcrop Itazu 1.