1. Noise Figures of Radio Receivers;Friis H. T.;Proceedings of the IRE,1944
2. IRE Standards on Methods of Measuring Noise in Linear Two ports;Proceedings of the IRE,1960
3. Theory of Noisy Fourports;Rothe H.;Proceedings of the IRE,1956
4. Representation of Noise in Linear Twoports;Proceedings of the IRE,1960
5. Circuit Theory of Linear Noisy Networks