Bialiauski, U. S., and I. S. Manak. “Laser Diode Radiation Phase Non-Uniformity Influence Account for Improvement Phototachymeter Accuracy Characteristics”. Elektronika Ir Elektrotechnika, vol. 67, no. 3, Mar. 2006, pp. 5-8, https://eejournal.ktu.lt/index.php/elt/article/view/10622.