While reading the preview of Sapta Vidha Anupapatti, I found some scriptures are considered as authoritative as Prasthanatrayi in Vishishtadvaita, as mentioned in the book:
In the Visistadvaita Vedanta tradition, the Tamil hymns of the Alvars, the Nalavira-divya-prabandham, as well as the Vaishnava Agamas and some of the Puranas, are considered to be as authoritative as the prasthana-traya.
Here one scripture is obvious Nalayira Divya Prabandha, others are Vaishnava Agamas and some of Puranas. Now, I think Pancharatra Agama would be considered or all the Vaishnava Agamas are considered? And talking about Puranas, I think Srimad Bhagavata MahaPurana and probably Vishnu Purana would be considered.
So, I want to what which Agamas and Puranas are considered as authoritative as Prasthanatrayi in Vishishtadvaita?