Ulbrich, M.N.C. (1993) Mineralogy of nepheline syenites from the Poços de Caldas alkaline massif SE Brazil: chemistry, X-ray data and microtextures of feldspars Revista Brasileira de Geociencias, 23, 388-399.

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	ULBRICH, MABEL N.C. (1993) Mineralogy of nepheline syenites from the Poços de Caldas alkaline massif, SE Brazil: chemistry, x-ray data and microtextures of feldspars. Revista Brasileira de Geociências, 23 (4) 388-399 doi:10.25249/0375-7536.1993234388399
	Ulbrich, M. N. (1993). Mineralogy of nepheline syenites from the Poços de Baldas Alkaline massif, se Brazil: chemistry, x-ray data and microtextures of feldspars. Brazilian Journal of Geology, 23(4), 388-399.
	Ulbrich, H.H.G.J. and Ulbrich, M.N.C. (2000) The lujavrite and khibinite bodies in the Poços de Caldas alkaline massif, southeastern Brazil: a structural and petrographic study. Revista Brasileira de Geociencias, 30, 615-622.
	Ulbrich, M.N.C. (1986) K-feldspars from Poços de Caldas nepheline syenites, southern Brazil: chemical, optical and XRD studies. Annaes da Academia Brasileira de Ciêncas, 58(1), 166.
	Ulbrich, M.N.C. (1986) K-feldspars from Poços de Caldas nepheline syenites, southern Brazil: chemical, optical and XRD studies. Annaes da Academia Brasileira de Ciêncas, 58,(1), 166.
	ULBRICH, HORSTPETER H., ULBRICH, MABEL N. C. (2000) The lujavrite and khibinite bodies in the Poços de Caldas alkaline massif, southeastern Brazil: a structural and petrographic study. Revista Brasileira de Geociências, 30 (4) 615-622 doi:10.25249/0375-7536.2000304615622
	Ulbrich, H. H. G. J., Demaiffe, D., Vlach, S. R., & Ulbrich, N. M. C. (2003). Geochemical and Sr, Nd and Pb isotope signatures of phonolites and nepheline syenites from the Poços de Caldas alkaline massif, southeastern Brazil. In South American Symposium of Isotope Geology (Vol. 4, pp. 698-701).
	ULBRICH, HORSTPETER H. G. J., VLACH, SILVIO R. F., ULBRICH, MABEL N. C., KAWASHITA, KOJI (2002) Penecontemporaneous syenitic-phonolitic and basic-ultrabasic-carbonatitic rocks at the Poços de Caldas alkaline massif, SE Brazil: geologic and geochronologic evidence. Revista Brasileira de Geociências, 32 (1) 15-26 doi:10.25249/0375-7536.20023211526
	Ulbrich, M.N.C. and Ulbrich, H.H.G.J. (1980) Os piroxeniosegirinicos de lujauritos e chibinitos do distribo alcalino de Poços de Caldas. [Aegirine pyroxenes in lujavrite and khibinite in the alkalic district of Poços de Caldas, Minas Gerais.] XXXI Congress Sociedade Brasileira de Geologia, Boletim 1, 93-94 (in Portuguese).
	Shea, M.E. (1992) Isotopic geochemical characterization of selected nepheline syenites and phonolites from the Poços de Caldas alkaline complex, Minas Gerais, Brazil. Journal of Geochemical Exploration, 45, 25-51.
	Shea, M.E. (1992) Isotopic geochemical characterization of selected nepheline syenites and phonolites from the Poços de Caldas alkaline complex, Minas Gerais, Brazil. Journal of Geochemical Exploration, 45, 25-51.