9Y.Torres, J.M. Gallardo,J.Dominguez. Brittle fractures of a crane hook [ J ]. Engineering Failure Analysis, 2010,17( 1 ) :38-47.
10Chijoo Lee,Ghang Lee, Suyeul Park. Analysis of field applicability of the rotation controllable tower-crane hook block[J J.Automation in Construc- tion,2012(21 ) :81-88.