@inproceedings{DoehringLoosenHartmann2006, author = {D{\"o}hring, Thorsten and Loosen, Klaus-Dieter and Hartmann, Peter}, title = {The technical challenge of large ELT filters}, series = {Proceedings of SPIE}, volume = {6273}, booktitle = {Proceedings of SPIE}, number = {62730U}, year = {2006}, subject = {Filter}, language = {en} }