Roberts, Winston. 1/m<sub>c</sub> Terms in lambda<sup>+</sup><sub>c</sub> Semileptonic Decays, article, February 1, 1992; (https://digital.library.unt.edu/ark:/67531/metadc931989/m1/3/: accessed July 17, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .