@article{AckermannErdmannRoitzsch1994, author = {J{\"o}rg Ackermann and Bodo Erdmann and Rainer Roitzsch}, title = {A self-adaptive multilevel finite element method for the stationary Schr{\"o}dinger equation in three space dimensions}, journal = {J. Chem. Phys.}, volume = {101}, pages = {7643 -- 7650}, year = {1994}, }