N.-C. Yeh, Technovation 33 108 (2013)
N.-C. Yeh, M. L. Teague, A. D. Beyer, B. Shen and H.-H. Wen, J. Phys. Conf. Series 400, 022140 (2013). [arXiv:1107.0697]
Link to PDF
N.-C. Yeh, blog post at Huffington Post, July 12 (2012)
http://www.huffingtonpost.com/naichang-yeh/tallberg-forum_b_1654174.html