Changes in phosphorite composition and properties during mechanical activationPetkova, Vilma; Tõnsuaadu, Kaia; Kaljuvee, Tiit; Traksmaa, RainerThe Third International Conference on the Valorization of Phosphates and Phosphorus Compounds : COVA Phos 3 : Marrakech, Morocco, March 18th-20th, 2009 : abstracts2009 / p. 186-188 Changes in phosphorite composition and properties during mechanical activationTõnsuaadu, Kaia; Kaljuvee, Tiit; Petkova, Vilma; Traksmaa, Rainer; Kirsimäe, KalleResearchers' Network on Phosphates : The Third International Conference on the Valorization of Phosphates and Phosphorus Compounds : COVAPHOS III : Marrakech, Morocco, March 18th-20th, 2009 : proceedings2009 / p. 15-21