Castorina, F. and Masi, U. (2010) “COMPARISON OF Sr ISOTOPIC RATIOS FROM TWO SOILS NEAR RAVENNA (ITALY) USING AQUA REGIA AND TWO-STEP SEQUENTIAL EXTRACTS”, EQA - International Journal of Environmental Quality, 4(4), pp. 7–14. doi: 10.6092/issn.2281-4485/3796.