Projectivities of free products
Rendiconti del Seminario Matematico della Università di Padova, Tome 42 (1969), pp. 341-387.
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     author = {Holmes, Charles S.},
     title = {Projectivities of free products},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {341--387},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {42},
     year = {1969},
     zbl = {0245.20031},
     mrnumber = {268286},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1969__42__341_0/}
}
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Holmes, Charles S. Projectivities of free products. Rendiconti del Seminario Matematico della Università di Padova, Tome 42 (1969), pp. 341-387. http://www.numdam.org/item/RSMUP_1969__42__341_0/

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