Yasuoka Y, Kobayashi M, Kurokawa D, Akasaka K, Saiga H and Taira M (2009) Evolutionary origins of blastoporal expression and organizer activity of the vertebrate gastrula organizer gene lhx1 and its ancient metazoan paralog lhx3. Development 136, 2005-14

Srivastava M, Larroux C, Lu DR, Mohanty K, Chapman J, Degnan BM and Rokhsar DS (2010) Early evolution of the LIM homeobox gene family. BMC Biol. 8, 4