A mathematical model for a problem in botany

References

• Chavan , R. R. 1981 . Systematic anatomy of secondary phloem in dicots , Volume 2. , Gujarat, , India : S.P.Univ. . Ph.D. Thesis
   Google Scholar
• Eames , A. J. 1961 . Morphology of the Angiosperms , New York : McGraw‐Hill .
   Google Scholar
• Esau , K. 1969 . The Phloem, Encyclopedia of Plant Anatomy , Berlin : Gebruder Borntraeger .
   Google Scholar
• Esau , K. and Cheadle , V. I. 1959 . Proc. natn. Acad. Sci. U.S.A. , 45 : 156 – 162 .
   PubMed Web of Science ®Google Scholar
• Esau , K. , Cheadle , V. I. and Gifford , E. M. Jr. 1953 . Am. J. Bot., , 40 : 9 – 19 .
   Web of Science ®Google Scholar
• Hutchinson , J. 1969 . The Families of Flowering Plants, Volume I Dicotyledons , London : Macmillan .
   Google Scholar
• Karnik , S. L. 1981 . Systematic anatomy of secondary phloem in dicots , Gujarat, , India : S.P. Univ. . Ph.D. Thesis
   Google Scholar
• Stebbins , G. L. 1974 . Flowering Plants, Evolution Above the Species Level , London : Arnold .
   Google Scholar
• Takhtazan , A. L. 1980 . Bot. Rev. , 46 (3) : 225 – 359 .
   Web of Science ®Google Scholar
• Zahur , M. S. 1959 . “ Comparative study of secondary phloem of 423 species of woody dicotyledons belonging to 85 families ” . In Cornell Univ. Agr. Expt. Sta. Mem. 358 Ph.D. Thesis
   Google Scholar