Effect of hydrostatic pressure on the direct absorption edge of germaniumBenjamin WelberManuel Cardonaet al.1977Physical Review B
Dependence of the direct energy gap of GaAs on hydrostatic pressureBenjamin WelberManuel Cardonaet al.1975Physical Review B
Dependence of the indirect energy gap of silicon on hydrostatic pressureB. WelberC.K. Kimet al.1975Solid State Communications
Energy-band structure and optical spectrum of grey tinFred H. PollakManuel Cardonaet al.1970Physical Review B