Gmelin Handbook: C: MVol.D1, 23.9.5, page 274 - 276
Full Text Show Details
Farbenfabriken vorm. Friedrich Bayer & Co.
Patent: DE252272 , 1912 ;
C. II, 1912 , p. 1587
Full Text Show Details
Sueddeutsche Kalkstickstoff-Werke
Patent: DE803351 , 1951 ;
C. II, 1951 , p. 2661

Perret; Biechler
Bl.Soc.ind.Mulh., 1936 , vol. 102, p. Proces-verbal S.58
Chem. Zentralbl., 1937 , vol. 108, # I p. 3124

Kitaev, G. A.; Maskaeva, L. N.; Markov, V. F.; Vasyunina, L. E.; Burkova, L. A.
Inorganic Materials (Transl. of Neorg. Mater.), 1989 , vol. 25, p. 1218 - 1220
Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1989 , vol. 25, p. 1438 - 1440

Smith Kline and French Laboratories Limited
Patent: US3950333 A1, 1976 ;
US 3950333 A

Leo Pharmaceutical Products Ltd. A/S
Patent: US4057636 A1, 1977 ;