Correction to the Vazn article
If you are interested in the rhythm used in Shahnameh and read the article by Saeed Nafisi, please note that there are several typos. An important one: under فریدون فرخ فرشته نبود it is written فعولن فعولن فعولن فعل
It should be فعولن فعولن فعولن فعول
Otherwise his argument would be void.