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| == Referències == | | == Referències == |
| <references/> | | <references/> |
| + | |
| + | * Dyar, Gunter, and Tasa (2007). Mineralogy and Optical Mineralogy. Mineralogical Society of America. ISBN 978-0939950812 |
| + | * H. A., Lowenstam (1981). «Minerals formed by organisms». Science 211 (4487): 1126-1131 |
| + | * [https://pubs.geoscienceworld.org/canmin Nickel, Ernest H. (1995). «The definition of a mineral». The Canadian Mineralogist 33 (3): 689-690. alt version] |
| + | * Warren, L. A.; Kauffman, M. E. (2003). «Microbial geoengineers». Science 299 (5609): 1027-1029. JSTOR 3833546. PMID 12586932 |
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| == Bibliografia == | | == Bibliografia == |