Temples TJ, Waddell MG, Domoracki WJ, Eyer J. Noninvasive determination of the location and distribution of DNAPL using advanced seismic reflection techniques. Ground Water. 2001 May;39(3):465–74. doi: 10.1111/j.1745-6584.2001.tb02331.x. PMID: 11341013.