Research in digital design and test at Tallinn University of TechnologyUbar, Raimund-Johannes; Jervan, Gert; Jutman, Artur; Raik, Jaan; Ellervee, Peeter; Kruus, MargusRadioelectronics & informatics2008 / p. 4-12 : illhttp://www.ewdtest.com/ri/%E2%84%96-1-40-january-march-2008/