books

(top, left) commercial edition of dissertation (1996, ISBN 9054780428, not available any more)
(center) dissertation (1994)
(right) Phyllotactische schoonheid (Phyllotactic beauty) as a new concept (2019, ISBN 9789082922516)
(bottom, left) Cambridge University Press 1994, ISBN 0521404827
(center) World Scientific 1998, ISBN 9810226217
(right) Kyoto University 2000, Sakyo-Ku, Kyoto 6068501