@article{Wambsganss2000, author = {Wambsganß, Joachim}, title = {Gravitationslinsen - universelle Werkzeuge der Astrophysik}, year = {2000}, language = {de} } @article{Wambsganss2000, author = {Wambsganß, Joachim}, title = {N{\"u}tzliche Illusionen : Astrophysik mit Gravitationslinsen}, year = {2000}, language = {de} } @article{Wambsganss2000, author = {Wambsganß, Joachim}, title = {Planeten um andere Sterne}, year = {2000}, language = {de} }