In this directory is a PDF of:
Felsenstein, J. 2002. Quantitative characters, phylogenies, and
morphometrics.pp. 27-44 in "Morphology, Shape, and Phylogenetics",
ed. N. MacLeod. Systematics Association Special Volume Series 64.
Taylor and Francis, London.
as file: quantchar.pdf
This PDF will show it mathematical characters and figures best if it is viewed in Adobe Acrobat Reader. Some browsers have their own PDF readers that seem to lose some of the symbols and figures in this PDF.
Please note carefully that these papers, as published in the journals, are copyright to the publishers of those journals.