Publications of Avrum Weinzweig
Geometry through transformations - an introduction to proof and axiomatics.
Bent Tree Press, 2006.
The fundamental group of a union of spaces.
Pacific J. Math.,
11:763--776, 1961.
MR0175133
The Kron method of tearing and the dual method of identification.
Quart. Appl. Math.,
18:183--190, 1960/1961.
MR0112587