1. �ber die Anzahl der Wurzeln einer algebraischen Gleichung in einem Kreise
2. EDMUNDS , J. , 1977 , Guide to Characteristic Locus Design Package , Control and Management Systems , University Engineering Department , Cambridge .
3. GOUGH , N. E. , KLEFTOURIS , D. N. , and THIGA , R. S. A. , 1977 , Paper presented at IFAC , MVTS Symposium , Fredericton , Canada .
4. The use of frequency transmission concepts in linear multivariate system analysis
5. KLEFTOURIS , D. N. , and KOUVARITAKIS , B. A. , 1978 , Report 332, School of Control Engineering , Bradford University , Bradford , England .