@ARTICLE\{IMM1994-03474, author = "B. Lindhardt and H. Holst and T. H. Christensen", title = "Comparison of soxhlet and shake extraction of polycyclic aromatic hydrocarbons from coal tar polluted soils sampled in the field", year = "1994", pages = "9-19", journal = "International Journal of Environmental Analytical Chemistry", volume = "57", editor = "", number = "", publisher = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/3474-full.html" }