found: His Vertex operator algebras and the Monster, c1989:CIP t.p. (Igor Frenkel; Dept. of Math., Yale Univ., New Haven, Conn.)
found: Feingold, A. Spinor construction of vertex operator algebras, triality, and E₈⁽¹⁾, 1991:CIP t.p. (Igor B. Frenkel) data sheet (b. 4/22/52)
found: From representation theory to mathematical physics and back, 2025:CIP title page (workshop in honor of Igor Frankel's 70th birthday, from representation theory to mathematical physics and back, May 31-June 4, 2022, Simons Center for Geometry, Stony Brook, New York)