Media type: E-Article Title: Stability of feedback systems with pulse-frequency modulation† Contributor: VARADARAJAN, M. S. imprint: Informa UK Limited, 1971 Published in: International Journal of Control Language: English DOI: 10.1080/00207177108931941 ISSN: 0020-7179; 1366-5820 Keywords: Computer Science Applications ; Control and Systems Engineering Origination: Footnote: