REFERENCES
- Davis & Ledgerwood, “Electromechanical components for servomechanism” (McGraw-Hill Book Co. Inc.)
- Gibson & Tutuer, “Control system components” (McGraw-Hill Book Co. Inc.), 1958.
- Canfield, “Electromechanical control system and devices” (John Wiley & Sons Inc.), 1965.
- Thaler & Brown, “Analysis and design of feedback control system” (McGraw-Hill Book Co. Inc.), second edition.