Martin, Adam C, Matthias Kaschube, and Eric F Wieschaus. (2009) 2009. “Pulsed Contractions of an Actin-Myosin Network Drive Apical Constriction.”. Nature 457 (7228): 495-9. Reference Link
Gregor, Thomas, Koichi Fujimoto, Noritaka Masaki, and Satoshi Sawai. (2010) 2010. “The Onset of Collective Behavior in Social Amoebae.”. Science 328 (5981): 1021-5. Reference Link