H. A North, X Zhao, S. M Kolk, M. A Clifford, D. M Ziskind and M. J. Donoghue
Development 136 ( 14 ): 2467 - 2476 , 2009
D. G Howarth and M. J. Donoghue
Molecular Biology and Evolution 26 ( 6 ): 1245 - 1258 , 2009