@article{BongsBurgerBirkletal.1999, author = {Bongs, Kai and Burger, Sven and Birkl, G. and Sengstock, Klaus and Ertmer, Wolfgang and Rzazewski, K. and Sanpera, Anna and Lewenstein, Maciej}, title = {Coherent Evolution of Bouncing Bose-Einstein Condensates}, volume = {83}, journal = {Phys. Rev. Lett.}, number = {18}, pages = {3577 -- 3580}, year = {1999}, language = {en} } @article{BurgerBongsDettmeretal.1999, author = {Burger, Sven and Bongs, Kai and Dettmer, Stefanie and Ertmer, Wolfgang and Sengstock, Klaus and Sanpera, Anna and Shlyapnikov, Gora and Lewenstein, Maciej}, title = {Dark Solitons in Bose-Einstein Condensates}, volume = {83}, journal = {Phys. Rev. Lett.}, number = {25}, doi = {10.1103/PhysRevLett.83.5198}, pages = {5198 -- 5201}, year = {1999}, language = {en} }