Conference paperGrowth and transport properties of multilayer superconducting films of Nd1.83Ce0.17CuOx / YBa2Cu3O7-δA. Gupta, R. Gross, et al.SPIE Advances in Semiconductors and Superconductors 1990
PaperDifferential operators and the theory of binomial enumerationGeorge MarkowskyJ. Math. Anal. Appl.