Authors: Lisa Kaltenegger; Frank Selsis; Malcolm Fridlund; Helmut Lammer; Charles Beichman; William Danchi; Carlos Eiroa; Thomas Henning; Tom Herbst; Alain Léger; René Liseau; Jonathan Lunine; Francesco Paresce; Alan Penny; Andreas Quirrenbach; Huub Röttgering; Jean Schneider; Daphne Stam; Giovanna Tinetti; Glenn J White Journal: Astrobiology Date: 2010 Jan-Feb Impact factor: 4.335