1971 With H. B. Gray Jr. and W. B. Upholt. A buoyant method for the determination of the superhelix density of closed circular DNA. J. Mol. Biol. 62:1-19.
With C. A. Smith and J. M. Jordan. In vivo effects of intercalating drug on the superhelix density of mitochondrial DNA isolated from human and mouse cells in culture. J. Mol. Biol. 59:255-272.
With A. E. Williams. The buoyant behavior of RNA and DNA in cesium sulfate solutions containing dimethylsulfoxide. Biochim. Biophys. Acta 228:423-439.
1972 With D. L. Robberson and H. Kasamatsu. Replication of mitochondrial DNA. Circular replicative intermediates. Proc. Natl. Acad. Sci. U. S. A. 69:737-741.
1973 With H. Kasamatsu. Unidirectionality of replication in mouse mitochondrial DNA. Nature New Biol. 241:103-105.
With L. I. Grossman and R. Watson. The presence of ribonucleotides in mature closed-circular mitochondrial DNA. Proc. Natl. Acad. Sci. U. S. A. 70:3339-3343.
1975 With D. E. Pulleyblank, M. Shure, D. Tang, and H.-P. Vosberg. Action of nicking-closing enzyme on supercoiled and nonsupercoiled closed circular DNA: Formation of a Boltzmann distribution of topological isomers. Proc. Natl. Acad. Sci. U. S. A. 72:4280-4284.