Needle electrodes for the measurement of DC and AC conductivity of potato / R. Podoba, I. Štubňa .
In: PRAE 2011 : proceedings of scientific works [149 s.]. -- Nitra : Slovak University of Agriculture, 2011. -- ISBN 978-80-552-0662-2 (brož.). -- S. 109-112
http://www.slpk.sk/eldo/2012/zborniky/004-12/Podoba_Stubna.pdf .