Roni Yagel David S. Ebert James N. Scott Yair Kurzion Grouping Volume Renderers for Enhanced Visualization in Computational Fluid Dynamics. 117-132 1995 1 IEEE Trans. Vis. Comput. Graph. 2 http://www.computer.org/tvcg/tg1995/v0117abs.htm db/journals/tvcg/tvcg1.html#YagelESK95