@article{bad07,
    author = {Bóo, Montserrat and Amor, Margarita and Döllner, Jürgen},
    journal = {GeoInformatica},
    title = {Unified Hybrid Terrain Representation Based on Local Convexifications},
    year = {2007},
    number = {3},
    pages = {331--357},
    volume = {11},
    doi = {10.1007/s10707-006-0003-y},
}