A. Puyet G. H. del Solar M. Espinosa Identification of the origin and direction of replication of the broad-host-range plasmid pLS1. 115-133 1988 16 Nucleic Acids Research 1 db/journals/nar/nar16.html#PuyetSE88 http://dx.doi.org/10.1093/nar/16.1.115