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Zavelani-Rossi M, Cerullo G, De Silvestri S, Gallmann L, Matuschek N, Steinmeyer G, Keller U, Angelow G, Scheuer V, Tschudi T.Zavelani-Rossi M, et al. Among authors: keller u.Opt Lett. 2001 Aug 1;26(15):1155-7. doi: 10.1364/ol.26.001155.Opt Lett. 2001.PMID: 18049547
Kornelis W, Biegert J, Tisch JW, Nisoli M, Sansone G, Vozzi C, De Silvestri S, Keller U.Kornelis W, et al. Among authors: keller u.Opt Lett. 2003 Feb 15;28(4):281-3. doi: 10.1364/ol.28.000281.Opt Lett. 2003.PMID: 12653371
Schenkel B, Biegert J, Keller U, Vozzi C, Nisoli M, Sansone G, Stagira S, De Silvestri S, Svelto O.Schenkel B, et al. Among authors: keller u.Opt Lett. 2003 Oct 15;28(20):1987-9. doi: 10.1364/ol.28.001987.Opt Lett. 2003.PMID: 14587798
Helbing FW, Steinmeyer G, Keller U, Windeler RS, Stenger J, Telle HR.Helbing FW, et al. Among authors: keller u.Opt Lett. 2002 Feb 1;27(3):194-6. doi: 10.1364/ol.27.000194.Opt Lett. 2002.PMID: 18007753
Schön S, Haiml M, Gallmann L, Keller U.Schön S, et al. Among authors: keller u.Opt Lett. 2002;27(20):1845-7. doi: 10.1364/ol.27.001845.Opt Lett. 2002.PMID: 18033382
Gallmann L, Steinmeyer G, Keller U, Imeshev G, Fejer MM, Meyn JP.Gallmann L, et al. Among authors: keller u.Opt Lett. 2001 May 1;26(9):614-6. doi: 10.1364/ol.26.000614.Opt Lett. 2001.PMID: 18040400
Gallmann L, Steinmeyer G, Sutter DH, Matuschek N, Keller U.Gallmann L, et al. Among authors: keller u.Opt Lett. 2000 Feb 15;25(4):269-71. doi: 10.1364/ol.25.000269.Opt Lett. 2000.PMID: 18059851
Sutter DH, Steinmeyer G, Gallmann L, Matuschek N, Morier-Genoud F, Keller U, Scheuer V, Angelow G, Tschudi T.Sutter DH, et al. Among authors: keller u.Opt Lett. 1999 May 1;24(9):631-3. doi: 10.1364/ol.24.000631.Opt Lett. 1999.PMID: 18073806