1. Thin film integrated RC networks with compensated temperature coefficients of R and C;Poetzlberger,1977
2. Munich and U.K. Patent 1482300, to H.W. Poetzlberger
3. The fabrication, assembly and test of hybrids on epoxy-fiber glass substrates;Ertel,1974
4. Electroless plating; its applications in resistor technology;Dearden;Electrocomp. Sci. Technol.,1976
5. The precision planar resistor;Ferry;New Electron,1975