P. Westbroek, E.W. de Vrind-de Jong, P. van der Wal, A.H. Borman and J.P.M de Vrind (1985) “Biopolymer-mediated Ca and Mn accumulation and biomineralization ”, Netherlands Journal of Geosciences, pp. 5-15. Available at: https://njgjournal.nl/index.php/njg/article/view/13159 (Accessed: 2April2026).