Improved laser technique for high sensitivity atomic absorption spectroscopy in flames Edward A. Whittaker, Peter Pokrowsky, Werner Zapka, Kevin Roche, Gary C. Bjorklund Journal of Quantitative Spectroscopy and Radiative Transfer Volume 30, Issue 4, October 1983, Pages 289-296 http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVR-46BVVHR-NX&_user=1915929&_coverDate=10%2F31%2F1983&_rdoc=1&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235541%231983%23999699995%23327824%23FLP%23display%23Volume)&_cdi=5541&_sort=d&_docanchor=&_ct=12&_acct=C000055340&_version=1&_urlVersion=0&_userid=1915929&md5=c436a59b2e86af08af1472b5db53044b