S. Hassan, A. (2011). Comparative study of different types of an active filter. , 15(4), 49-60.
Abbas. S. Hassan. "Comparative study of different types of an active filter". , 15, 4, 2011, 49-60.
S. Hassan, A. (2011). 'Comparative study of different types of an active filter', , 15(4), pp. 49-60.
S. Hassan, A. Comparative study of different types of an active filter. , 2011; 15(4): 49-60.


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