Being a mathematical physicist, I have a particular fondness for his papers in Topology in the 1980s, alone or with Mathai, on the subject of superconnections:

• Superconnections and the Chern character, Topology 24 (1985) 89-95

• Superconnections, Thom classes, and equivariant differential forms, Topology 25 (1986) 85-100

• Superconnection character forms and the Cayley transform, Topology 27 (1988) 211-238

All are sadly hidden behind an Elsevier paywall...