A Methodology for the Discussion of Contour: Its Application to Schoenberg's Music. Friedmann, M. L. Journal of Music Theory, 29(2):223–248, 1985.
bibtex   
@Article{          friedmann1985-methodology,
    author       = {Friedmann, Michael L.},
    year         = {1985},
    title        = {A {Methodology} for the {Discussion} of {Contour}: {Its}
                   {Application} to {Schoenberg}'s {Music}},
    volume       = {29},
    number       = {2},
    journal      = {Journal of Music Theory},
    pages        = {223--248}
}

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