@article{eage:/content/papers/10.3997/2214-4609.201409550, author = "Böhm, G. and Madrussani, G. and L. Vesnaver, A.", title = "3D Ray Tracing by the Fermat's Principle in Irregular Grids", journal= "", year = "1995", volume = "", number = "", pages = "", doi = "https://doi.org/10.3997/2214-4609.201409550", url = "https://www.earthdoc.org/content/papers/10.3997/2214-4609.201409550", publisher = "European Association of Geoscientists & Engineers", issn = "2214-4609", type = "", eid = "cp-90-00357", }