Document Type : Original Article
Poursaeed, M. H. (2002). Using the summation symbol in counting. Andishe_ye Amari, 7(1), 61-65.
Poursaeed, M. H. "Using the summation symbol in counting", Andishe_ye Amari, 7, 1, 2002, 61-65.
Poursaeed M. H. (2002). 'Using the summation symbol in counting', Andishe_ye Amari, 7(1), pp. 61-65.
M. H. Poursaeed, "Using the summation symbol in counting," Andishe_ye Amari, 7 1 (2002): 61-65,
Poursaeed M. H. Using the summation symbol in counting. Andishe_ye Amari. 2002;7(1):61-65 (In Persian).
