Tremblay, E. J. Loterie, D. Moser, C. Media 2: Thermal phase change actuator for self-tracking solar concentration Originally published in Optics Express on 05 November 2012 (oe-20-S6-A964) media;oe;self-tracking;Optics Express;05 November 2012;-20-S;phase change actuator;concentration 2012-11-05
    https://opticapublishing.figshare.com/articles/media/Media_2_Thermal_phase_change_actuator_for_self-tracking_solar_concentration/4945346
10.1364/OE.20.00A964.m002