4Carl O Anderson,Tulsa,Okla.Method of producing monofluoro-phosphates:US,2481807[P].1949-12-13.
5Cleveland F J.Improvements for the continuous production of alkali metal monofluorophosphates:GB,1288972[P].1972-12-13.
6Frank B Dehn.Process for the continuous production of alkali metal monofluorophosphates:GB,1186664[P].1970-04-02.
7Rohlfs,Dr Hans Adolf,Skurnia,et al.Verfahren zur kontinuierlichen herstellung von alkalimonofluorphosphaten und vorrichtung zur durchfuhrung des verfahrens:DE,1667413[P].1970-04-23.
8Armin Etzel,Richars Taenzler,Alexander Maurer,et al.Apparatus for the preparation of alkali metal:US,5198088[P].1993-03-30.
9Hans Adolf Rohlfs,Heinz Schmidf,Wiesbaden Biebrich,et al.Process for the manufacture of metal fluorophosphates:US,3401013[P].1968-12-10.
10Hans Adolf Rohlfs,Heinz Schmidf,Wiesbaden Biebrich,et al.Procede pour la preparation de fluorphosphates metalliques:FR,1475556[P].1967-03-31.