@article{RACSAM_2005_2005_1_a4,
     author = {R{\'\i}der Moyano, Alfonso and Rubio Ruiz, Rafael Mar{\'\i}a},
     title = {Una l\'ogica modal para la geometr{\'\i}a esf\'erica de incidencia.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales. Matem\'aticas},
     pages = {79-117},
     publisher = {mathdoc},
     volume = {99},
     number = {1},
     year = {2005},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RACSAM_2005_2005_1_a4/}
}