Timing Driven Placement Using Complete Path Delays. - Wilm E. Donath; Reini J. Norman; Bhuwan K. Agrawal; Stephen E. Bello; Sang-Yong Han; Jerome M. Kurtzberg; Paul Lowy; Roger I. McMillan (DAC, 1990)

Differential current switch-High performance at low power. - Edward B. Eichelberger; Stephen E. Bello (IBM J. Res. Dev., 1991)