1. Ultrasonic extraction of heavy metals from environmental and industrial hygiene samples for their subsequent determination;Ashley;Trends in Analytical Chemistry,1988
2. Environmental Analysis. Techniques, Applications and Quality Assurance;Barceló,1993
3. Extraction Methods for Environmental Analysis;Dean,1998
4. Sonochemistry. Part I – The physical aspects;Lorimer;Chemical Society Reviews,1987
5. Strategies for solid sample treatment;Luque de Castro;Trends in Analytical Chemistry,1997