Michel Chapron N. Ivanov P. Boissard P. Valery 3d Reconstruction of Plants. 643-646 1992 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/1992/papers/1992643.pdf conf/mva/1992 db/conf/mva/mva1992.html#ChapronIBV92