@book{euclidis+elementa+vol+4+libros+xi+xiii+continens,
    author = {Euclides},
    title = {Euclidis Elementa. Vol. 4, Libros XI-XIII continens},
    address = {Lipsiae},
    publisher = {In aedibus B. G. Teubneri},
    date = {1885}
}