From the Robin Catalogue:
A. MS., n.p., [c.1901], pp. 1-9, plus 21 pp. of variants.
Several attempts to write the same pages. Basic conventions of the system of existential graphs. A reference to the Monist article of January 1897.
The entry in BibTeX format.
A proper name is a sign denoting something having an identity consisting in continuity of existence and common to the experience of the deliverer and interpreter of the proposition of which it forms a part.