1. ‘Microwave noise figure measurements on double barrier resonant tunneling diodes’, EUT report, 90-E-242, Eindhoven University of Technology, Faculty of Electrical Engineering, The Netherlands, 1990
2. Hewlett Packard‘HP 8970B noise figure meter including the HP 8970S/T noise measurement system’, Operating manual part no. 08970-90033
3. Hewlett Packard‘Fundamentals of rf and microwave noise measurements’, Application note 57-1