. "DK" . "Acta Crystallogr.,Sect.D" . "ABCRE6" . "0766" . "0907-4449" . "49" . "468" . "477" . "10.1107/S0907444993004858" . . "DNA helix structure and refinement algorithm: comparison of models for d(CCAGGCm5CTGG) derived from NUCLSQ, TNT and X-PLOR." . . .