Fortunato, E., R. Martins, I. Ferreira, M. Santos, A. Macarico, and L. Guimaraes. "Tunneling in vertical ?c? Si/a? Si< sub> x</sub> C< sub> y</sub> O< sub> z</sub>: H/?c? Si heterostructures." Journal of Non-Crystalline Solids. 115.1 (1989): 120-122.