Adaptive-rate inductive impedance based coin validationMärtens, Olev; Land, Raul; Gavrijaševa, Alina; Mõlder, Ago2011 IEEE 7th International Symposium on Intelligent Signal Processing (WISP) : Floriana, Malta, September 19-21, 2011 : proceedings2011 / p. 122-125: ill

Eddy current validation of Euro-coinsGordon, Rauno; Märtens, Olev; Land, Raul; Min, Mart; Rist, Marek; Gavrijaševa, Alina; Pokatilov, Andrei; Kolyshkin, AndreiLecture notes on impedance spectroscopy : measurement, modeling and applications. Vol. 32012 / p. 47-63 : ill

Variable-resolution image processing for validation of coinsMärtens, Olev; Saar, Tõnis; Gavrijaševa, Alina; Mõlder, Ago2011 IEEE 7th International Symposium on Intelligent Signal Processing (WISP) : Floriana, Malta, September 19-21, 2011 : proceedings2011 / p. 176-179: ill https://ieeexplore.ieee.org/document/6051711