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4. O. Tiboni, B. Parisi, and O. Ciferri, in “Acides nucleiques et synithèse des proteines chez les végétaux” L. Bogorad and J.H. Weil, eds., Coll. Int. C.N.R.S., p. 345–349, (1977).
5. O. Ciferri, and O. Tiboni, in “Translation of Natural and Synthetic Polynucleotides ”, A. B. Legocki, ed., Poznan Agricultural University, p. 173–177, (1977).