@article{eage:/content/papers/10.3997/2214-4609-pdb.3.P234, author = "Calvert, R.W. and Bakulin, A. and Jones, T.C.", title = "Virtual Sources, a New Way to Remove Overburden Problems", journal= "", year = "2004", volume = "", number = "", pages = "", doi = "https://doi.org/10.3997/2214-4609-pdb.3.P234", url = "https://www.earthdoc.org/content/papers/10.3997/2214-4609-pdb.3.P234", publisher = "European Association of Geoscientists & Engineers", issn = "2214-4609", type = "", eid = "cp-3-00540", }