@article{kivshar:1998:ds,
    author = {Kivshar, Y. and Luther-Davies, B.},
     title = {Dark optical solitons: Physics and applications},
   journal = {Physics Reports},
      year = {1998},
    volume = {298},
    number = {2-3},
     pages = {81–197},
       doi = {10-1016/S0370-1573(97)00073-2}}