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\bibitem{Muys_etal2021} {\textquotedblleft}\textit{A systematic comparison of commercially produced struvite : quantities, qualities and soil-maize phosphorus availability}{\textquotedblright}. Muys M, Phukan R, Brader G, Samad A, Moretti M, Haiden B, Pluchon S, Roest K, Vlaeminck SE, Spiller M, Science Of The Total Environment \textbf{756}, 143726 (2021).   http://doi.org/10.1016/J.SCITOTENV.2020.143726

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