Vittori Antisari, L. et al. 2014. CRITICAL EVALUATION OF AN INTERCALIBRATION PROJECT FOCUSED ON THE DEFINITION OF NEW MULTI-ELEMENT SOIL REFERENCE MATERIALS (AMS-MO1 AND AMS-ML1). EQA - International Journal of Environmental Quality. 15, 15 (Dec. 2014), 41–64. DOI:https://doi.org/10.6092/issn.2281-4485/4553.