@Misc{2006,
title="Heterodyne detection: II. Astronomy 525. Lecture 30",
year="2006",
optkeywords="detector; mixer; heterodyne detection; mixing",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=542), last updated on Mon, 29 Dec 2008 13:49:41 -0600"
}