Al- Hamza Mahdi Hamza, A. (2005). fuzzypetri net model analysis using pivot and invariant method. , 10(3), 810-819.

Abed Al- Hamza Mahdi Hamza. "fuzzypetri net model analysis using pivot and invariant method". , 10, 3, 2005, 810-819.

Al- Hamza Mahdi Hamza, A. (2005). 'fuzzypetri net model analysis using pivot and invariant method', , 10(3), pp. 810-819.

Al- Hamza Mahdi Hamza, A. fuzzypetri net model analysis using pivot and invariant method. , 2005; 10(3): 810-819.