Brian H. Cumpston, Sundaravel P. Ananthavel, Stephen Barlow, Daniel L. Dyer, Jeffrey E. Ehrlich, Lael L. Erskine, Ahmed A. Heikal, Stephen M. Kuebler, I.-Y. Sandy Lee, Dianne McCord-Maughon, Jinqui Qin, Harald Röckel, Mariacristina Rumi, Xiang-Li Wu, Seth R. Marder, Joseph W. Perry,
Two-photon polymerization initiators for three-dimensional optical data storage and microfabrication Nature. ,vol. 398, pp. 51- 54 ,(1999) ,
10.1038/17989