@article{214286, author = {Lu Deng and Guoxiang Huang and C Hang}, title = {Generalized nonlinear Schrödinger equation and ultraslow optical solitons in a cold four-state atomic system}, year = {2006}, number = {73}, month = {2006-03-13}, publisher = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, doi = {https://doi.org/10.1103/PhysRevE.73.036607}, language = {en}, }