Stotram by Erumbiyappa in 9 languages http://acharya.org/sloka/erumbiyappa/pd-l.html
Srirangaraja Stavam – Poorva Shatakam – Tattvartha Chintamani
Commentary in Tamil by P B Annangarachariar Swami http://acharya.org/bk/pb/pba/srrs-ps-tc.pdf
Ramanuja Vaibhavam
Talk in English, by TCA Venkatesan https://srivaishnava.bandcamp.com/track/ramanuja-vaibhavam-english
Yatiraja Vimshati Text
Manavala Mamunigal’s Yatiraja VimshatiText in 9 languages http://acharya.org/sloka/mamunigal/yv-l.html
Origin and Growth of Sri Brahmatantra Parakala Mutt
1949 Book in English by N Desikacharya Swami http://acharya.org/bk/pb/nd/oagbpm.pdf