@unpublished{TUW-167284, author = {Mendes Cerveira, Pj. and Englich, Sigrid and Spicakova, Hana}, title = {The ''G'' Wettzell Ring Laser as a North-South Tilt Probe}, year = {2008}, note = {talk: Earth Tides Symposium, Jena, Deutschland; 2008-09-01 -- 2008-09-05} }