Urbaniec, K.
(2011).
 Theoretical Analysis of the Efficiency of  Thermionic Energy Converter's.
<em>Journal Of Power Technologies, 30</em>, 3-46.
Retrieved from <a href="https://papers.itc.pw.edu.pl/index.php/JPT/article/view/60" target="_new">https://papers.itc.pw.edu.pl/index.php/JPT/article/view/60</a>