Measuring planck’s constant in a physics laboratory experiment using LEDs1 / K. Kardjilova, V. Pulov, P. Popov .
In: PRAE 2011 : proceedings of scientific works [149 s.]. -- Nitra : Slovak University of Agriculture, 2011. -- ISBN 978-80-552-0662-2 (brož.). -- S. 62-66
http://www.slpk.sk/eldo/2012/zborniky/004-12/Kardjilova.pdf .