Vigesimum Primum Problema. In quaduodecim domorum coeli stella quevis aut punctum coeli quodlibet constituatur, explorare.
Regiomontani Tabvla Sinvvm, per singula minuta extensa, vniuersam sphaericorum triangulorum scientiam complectens [1], GDML_Books, (1584), p. 14 / Harvested from
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@article{PPN555509575+dmdlog26,
     title = {Vigesimum Primum Problema. In quaduodecim domorum coeli stella quevis aut punctum coeli quodlibet constituatur, explorare.},
     booktitle = {Regiomontani Tabvla Sinvvm, per singula minuta extensa, vniuersam sphaericorum triangulorum scientiam complectens [1]},
     series = {GDML\_Books},
     publisher = {Welack},
     address = {Witebergae},
     year = {1584},
     pages = {14},
     url = {http://dml.mathdoc.fr/item/PPN555509575+dmdlog26}
}

 (éd.). Vigesimum Primum Problema. In quaduodecim domorum coeli stella quevis aut punctum coeli quodlibet constituatur, explorare., dans Regiomontani Tabvla Sinvvm, per singula minuta extensa, vniuersam sphaericorum triangulorum scientiam complectens [1], GDML_Books,  (1584), p. 14. http://gdmltest.u-ga.fr/item/PPN555509575+dmdlog26/