1. Crystal chemistry of beryl;Bakakin;Geokhimiya,1962
2. Structure of the Muzo emeralds;Barriga Villalba;Revista Cien. Exact., Acad. Colo. Fisico-Quim. Nat.,1953
3. The determination of the structural parameters of beryl by the method of bounded projections;Belov;Doklady Akad. Nauk SSSR,1951
4. The structure of beryl, Be3Al2Si6O18;Bragg,1926