Deborah H. Brotherton, Venugopal Dhanaraj, Scott Wick, Leonardo Brizuela, Peter J. Domaille, Elena Volyanik, Xu Xu, Emilio Parisini, Brian O. Smith, Sharon J. Archer, Manuel Serrano, Stephen L. Brenner, Tom L. Blundell, Ernest D. Laue,
Crystal structure of the complex of the cyclin D-dependent kinase Cdk6 bound to the cell-cycle inhibitor p19INK4d. Nature. ,vol. 395, pp. 244- 250 ,(1998) ,
10.1038/26164