1. Theory of a wide-gap emitter for transistors;Kroemer,1957
2. Quasi-electric and quasi-magnetic fields in a non-uniform semiconductor;Kroemer;RCA Rev.,1957
3. Semiconductor laser with electric pumping;Alferov,1963
4. A proposed class of heterojunction injection lasers;Kroemer,1963
5. H.Kroemer US Patent 3 309 553 (1967) (Filed 16 August 1963).