Krimer, D B Extrachromosomal DNA of pea (Pisum sativum) root-tip cells replicates by strand displacement. [electronic resource] - Proceedings of the National Academy of Sciences of the United States of America Apr 1983 - 1933-7 p. digital Publication Type: Journal Article ISSN: 0027-8424 Standard No.: 10.1073/pnas.80.7.1933 doi