00635nam2 22002171i 450 990002362210403321000236221FED01000236221(Aleph)000236221FED0100023622120030801d--------km-y0itay50------baTopological modification of DNAcircles,loops, knots, and branches. Amsterdam, 1999, v. 7, p. 341-369.001000222967Kool,Eric T.91721ITUNINARICAUNIMARCBK990002362210403321FFABCTopological modification of DNA441666UNINAING01