@article{CeymanRosspeintnerSchrecketal.2016,
  author    = {Harald Ceyman and Arnulf Rosspeintner and Maximilian H. Schreck and Carina M{\"u}tzel and Andreas Stoy and Eric Vauthey and Christoph Lambert},
  title     = {Cooperative enhancement versus additivity of two-photon-absorption cross sections in linear and branched squaraine superchromophores},
  journal   = {Physical Chemistry Chemical Physics},
  volume    = {18},
  number    = {24},
  doi       = {10.1039/c6cp02312f},
  year      = {2016},
}