Jankovskis, J., D. Stepins, S. Tjukovs, and D. Pikulins. 2008. “Examination of Different Spread Spectrum Techniques for EMI Suppression in dc/Dc Converters”. Elektronika Ir Elektrotechnika 86 (6):60-64. https://eejournal.ktu.lt/index.php/elt/article/view/11185.