Characteristic dimensions and the micro-mechanisms of fracture and fatigue in 'nano' and 'bio' materials,
Ritchie, R. O., Kruzic J. J., Muhlstein C. L., Nalla R. K., and Stach E. A.
, International Journal of Fracture, Jul-Aug, Volume 128, Number 1-4, p.1-15, (2004)