| Japan | | |
| Kimbara K., Nagata H. (1974) Clay minerals in the core samples of the mineralized zone of Niida, Southern part of Odate, Akita prefecture, Japan, with special reference to the mineralogical properties of sudoite and tosudite, - J. Japan Miner. Econ. Geol., 69(7), p.239-254. | |
| Sudo T., Kodama H. (1957) An aluminium mixed-layer mineral of montmorillonite-chlorite, - Ztschr. Kristallogr., 109(4/6). s. 379-387. |
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