Book in Tamil http://acharya.org/bk/pb/pl/svbm.pdf
Acharya Hrudayam – Vyakhyanam, Pratipadam, Arumpadam and Pramana Thirattu
1906 Book http://acharya.org/bk/pb/Vyakhyanam/ahvap.pdf
Kooraththazhvan Vaibhavam
1919 Book in Tamil, by Sri U Ve P B Annangarachariar Swami http://acharya.org/bk/pb/pba/kav-pba.pdf
Uththama Nambi Vaibhavam
1912 Book in Tamil by Srirangam S Narasimhachariar Swami http://acharya.org/bk/pb/ssn/unv.pdf
சரணாகதி கத்யம் ஓர் அறிமுகம்
An introduction to Bhagavad Ramanujar’s Sharanagati Gadyam – talk in Tamil by TCA Venkatesan https://svlife.gumroad.com/l/xdjcq