Ján Veizer, Dieter Buhl, Andreas Diener, Stefan Ebneth, Olaf G Podlaha, Peter Bruckschen, Torsten Jasper, Christoph Korte, Michael Schaaf, Davin Ala, Karem Azmy,
Strontium isotope stratigraphy: potential resolution and event correlation Palaeogeography, Palaeoclimatology, Palaeoecology. ,vol. 132, pp. 65- 77 ,(1997) ,
10.1016/S0031-0182(97)00054-0