Werner, J.; Rung, J. On “Pythagorean triangles and linear difference equations”. (Zu “Pythagoreische Dreiecke und lineare Differenzengleichungen”.) (German) Zbl 0752.11016 Prax. Math. 33, No. 5, 230 (1991). Reviewer: J.Piehler (Merseburg) MSC: 11D09 PDFBibTeX XMLCite \textit{J. Werner} and \textit{J. Rung}, Prax. Math. 33, No. 5, 230 (1991; Zbl 0752.11016)
Rung, J. Pythagorean triangles and linear difference equations. (Pythagoreische Dreiecke und lineare Differenzengleichungen.) (German) Zbl 0752.11013 Prax. Math. 32, No. 3, 102-106 (1990). Reviewer: J.Piehler (Merseburg) MSC: 11D09 PDFBibTeX XMLCite \textit{J. Rung}, Prax. Math. 32, No. 3, 102--106 (1990; Zbl 0752.11013)