Quantitative elemental analysis of steel using calibration-free laser-induced breakdown spectroscopy Shah, M. L. ; Pulhani, A. K. ; Gupta, G. P. ; Suri, B. M. Abstract Publication: Applied Optics Pub Date: July 2012 DOI: 10.1364/AO.51.004612 Bibcode: 2012ApOpt..51.4612S