Piepser: A Smart Wrist-Worn Variometer To Maximize The Paragliders Flytime. - Tim Fischer 001; Michael Ganz; Nicolas Baumann; Michele Magno (SAS, 2019)

Piepser 2.0: A Self-Sustaining Smartwatch to Maximize the Paragliders Flytime. - Nicolas Baumann; Michael Ganz; Michele Magno (IEEE Trans. Instrum. Meas., 2020)