Piper, P. W., Celis, J., Kaltoft, K., Leer, J. C., Nielsen, O. F., & Westergaard, O. (1976). Tetrahymena ribosomal RNA gene chromatin is digested by micrococcal nuclease at sites which have the same regular spacing on the DNA as corresponding sites in the bulk nuclear chromatin.

Piper, P W., J. Celis, K. Kaltoft, J C. Leer, O F. Nielsen, and O. Westergaard. Tetrahymena Ribosomal RNA Gene Chromatin Is Digested By Micrococcal Nuclease At Sites Which Have the Same Regular Spacing On the DNA As Corresponding Sites in the Bulk Nuclear Chromatin. 1976.

Piper, P W., et al. Tetrahymena Ribosomal RNA Gene Chromatin Is Digested By Micrococcal Nuclease At Sites Which Have the Same Regular Spacing On the DNA As Corresponding Sites in the Bulk Nuclear Chromatin. 1976.