Optimization of Functionals of Orthonormal Functions in the Absence of Unitary Invariance. - Peter Klüpfel; Simon Klüpfel; Kiril Tsemekhman; Hannes Jónsson (PARA (2), 2010)

Eyra - Speech Data Acquisition System for Many Languages. - Matthias Petursson; Simon Klüpfel; Jón Guðnason (SLTU, 2016)

Building ASR Corpora Using Eyra. - Jón Guðnason; Matthías Pétursson; Róbert Kjaran; Simon Klüpfel; Anna Björk Nikulásdóttir (INTERSPEECH, 2017)