Duodecimum Problema. Arcum semidiurnum Solis vel alterius stella cuiuscunq cognoscere.
Regiomontani Tabvla Sinvvm, per singula minuta extensa, vniuersam sphaericorum triangulorum scientiam complectens [1], GDML_Books, (1584), p. 7 / Harvested from
Access to full text 
@article{PPN555509575+dmdlog17,
     title = {Duodecimum Problema. Arcum semidiurnum Solis vel alterius stella cuiuscunq cognoscere.},
     booktitle = {Regiomontani Tabvla Sinvvm, per singula minuta extensa, vniuersam sphaericorum triangulorum scientiam complectens [1]},
     series = {GDML\_Books},
     publisher = {Welack},
     address = {Witebergae},
     year = {1584},
     pages = {7},
     url = {http://dml.mathdoc.fr/item/PPN555509575+dmdlog17}
}

 (éd.). Duodecimum Problema. Arcum semidiurnum Solis vel alterius stella cuiuscunq cognoscere., dans Regiomontani Tabvla Sinvvm, per singula minuta extensa, vniuersam sphaericorum triangulorum scientiam complectens [1], GDML_Books,  (1584), p. 7. http://gdmltest.u-ga.fr/item/PPN555509575+dmdlog17/