Libellvs De Commvnibvs Et Vsitatis Arithmeticæ practicæ regulis / in usum studiosæ iuuentutis dilige[n]ter conscriptus, ab Henrico Vuelpio Lingensi, in academia Rostochiana publico artium professore. - Vuelpius, Henricus ( -1560) (Ioannes Gymnicus excudebat, 1544)