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  1. Needham, J.T. Observations Upon the Generation, Composition and
    Decomposition of Animals and Vegetable Substances. London, 1749.
  2. Nelson, T.C. Kinetics of genetic recombination in Escherichia coli.
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  3. Newcombe, H.B. Origin of bacterial variants. Nature, 164, 150—151,
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  4. Nicolov, N.N. Experimental mutagenesis in unicellular green algae. I.
    Comparative study of mutagenic effect of N-nitrosomethylurethane, N-
    nitrosoethylurethane, and a supposed mechanism of their action in
    Scenedesmus acutus (In Russian). Genetica, 9, 118—123, 1973 a.
  5. Nicolov, N.N. Experimental mutagenesis in unicellular green algae. II.
    Comparative study of the mutagenic effect of some N-
    nitrosoalkylureas with respect to N-nitrosoalkylurethanes in
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  6. Nicolov, N.N. Experimental mutagenesis in unicellular green algae.
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    acutus     (In Russian). Genetica, 9, 45—48, 1973 c.
  7. Nicolov, N.N. Behaviour of the nucleus in the life cycle of
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  8. Nicolov, N.N. Asynchronous cell division in unicellular green algae of
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  9. Nicolov, N.N. Asynchronous cell division in the unicellular green
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  10. Nicolov, N.N. Asynchronous nuclear and cell division in unicellular
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  11. Nicolov, N.N. Asynchronous nuclear and cell division as a natural
    biological process in unicellular green algae. Endocytobiosis and Cell
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  12. Nicolov, N.N. Biological aging and neoplasms. Compt. rend. Acad.
    bulg. Sci., 50, 89—92, 1997 b.
  13. Nicolov, N.N., L.N. Mladenova. Experimental mutagenesis in
    unicellular green algae. IV. Comparative investigation of the
    mutagenetic effect of the homologous series of N-nitrosonitro-
    alkylguanidines in Scenedemus acutus (In Russian). Genetica, 11,
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  14. Nicolov, N.N., E. L. Tchacarof. Cytochemical studies on the dynamics
    of increase in the number of nuclei in the life cycle of Scenedesmus
    acutus. Compt. rend. Acad. bulg. Sci., 37, 669—672, 1984.
  15. Nicolov, N.N., N.B. Hubavenska, Ch.K. Velev. Rhe role of NO-group
    in manifestation of high mutagenic effect of N-nitrosoalkylureas in
    Scenedesmus acutus (in Russian). Genetica, 14, 673—677, 1978