Viliūnas, V., H. Vaitkevičius, Z. Bliznikas, and K. Breivė. “Rating the Colour Quality of the Solid-StateWhite Light Lamps”. Elektronika Ir Elektrotechnika, vol. 95, no. 7, Aug. 2009, pp. 29-32, https://eejournal.ktu.lt/index.php/elt/article/view/10032.