| , New second-stage concentrators XX SMS for parabolic primaries; Comparison with conventional parabolic trough concentrators, Solar Energy 92 2013 98—105• The gap between the sheets is closed at the bottom, sides and top | Two liquids of different densities completely fill a narrow space between two sheets of transparent plastic |
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| , Infinitesimal etendue and Simultaneous Multiple Surface SMS concentrators for fixed receiver troughs, Solar Energy 97 2013 493—504• The whole assembly is rotating around a vertical axis passing through the centre | ,, Nonimaging Optics, Academic Press, 2004• |
Parabolic shape formed by a liquid surface under rotation.