Changes

==Star diagrams==

==Star diagrams==

Star diagrams (polar plots) are sometimes used to display the relative amounts of a series of peaks in a chromatogram. See, for example, Kaufman et al.<ref name=ch08r23>Kaufman, R., L., Ahmad, A., S., Hempkins, W., B., 1987, A new technique for the analysis of commingled oils and its application to production allocation calculations, in Proceedings of the 16th Annual Convention of the Indonesian Petroleum Association: p. 247–268.</ref>

Star diagrams (polar plots) are sometimes used to display the relative amounts of a series of peaks in a chromatogram. See, for example, Kaufman et al.<ref name=ch08r23>Kaufman, R. L., A. S. Ahmad, and W. B. Hempkins, 1987, A new technique for the analysis of commingled oils and its application to production allocation calculations, in Proceedings of the 16th Annual Convention of the Indonesian Petroleum Association: p. 247–268.</ref>

==Limitations due to maturity differences==

==Limitations due to maturity differences==