@inproceedings{Gierer2007,
  author    = {Alfred Gierer},
  title     = {Hydra the model - model for what?},
  url       = {http://edoc.bbaw.de/oa/talks/reFH6Tgl2fkrE/PDF/245Vp6Kzo9IQ2.pdf},
  year      = {2007},
}