Haber, D A Unstable amplification of an altered dihydrofolate reductase gene associated with double-minute chromosomes. [electronic resource] - Cell Nov 1981 - 355-62 p. digital Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. ISSN: 0092-8674 Standard No.: 10.1016/0092-8674(81)90204-x doi Subjects--Topical Terms: AnimalsCell SeparationCells, CulturedChromosomes--ultrastructureFlow CytometryGene AmplificationMiceMutationSelection, GeneticTetrahydrofolate Dehydrogenase--genetics