Ovsianikov, A.; Gaidukeviciute, A.; Chichkov, B.N.; Oubaha, M.; MacCraith, B.D. et al.: Two-photon polymerization of hybrid sol-gel materials for photonics applications. In: Laser Chemistry 2008 (2008), 493059. DOI:
https://doi.org/10.1155/2008/493059