@article{andrade-geoinfo-ext-viewshed-2008,
    author = "Andrade, Marcus V. A. and de Magalhães, Salles V. G. and de Magalhães, Mirella A. and Franklin, W. Randolph and Cutler, Barbara M.",
    title = "Efficient viewshed computation on terrain in external memory",
    journal = "Geoinformatica",
    year = "2010",
    href = "\bibhref{126-andrade-geoinfo-ext-viewshed-2008}",
    URL = "http://www.springerlink.com/content/p1783648185g1252/",
    DOI = "https://doi.org/10.1007/s10707-009-0100-9",
    mykey = "visviewshedsiting marcus salles",
    note = "(online 26 Nov 2009)"
}