Deformulation of metalworking lubricants: Organic phosphorus additives characterization by 1H, 13C and 31P NMR C. Pierlot, J. Marko, C. Faven, N. Azaroual, G. Vermeersch and J.-M. AubryAnalusis, 27 9 (1999) 804-812DOI: https://doi.org/10.1051/analusis:1999147