@Article{walther1,
  author = {T. Walther and H. Reinsch and K. Ostermann and A. Deutsch and T. Bley},
  title = {Coordinated development of yeast colonies: an experimental analysis of the 
adaptation to different nutrient concentrations - part 1},
  journal	= {Eng. Life Sci},
  volume	= {5},
  number	= {2},
  year		= {2005},
  pages		= {115--124},
  keywords	= "bison",
  pdfurl	= "http://www.cs.unibo.it/bison/publications/Walther1.pdf"
}