1878 Book in Tamil http://acharya.org/bk/pb/PAP/srv-pp.pdf
Ramanuja on the Yoga
1976 Book in English, by Dr Robert C Lester http://acharya.org/bk/pb/rel/roty.pdf
Divyaprabandha Arunjchol Agaradhi
Book in Tamil by S Balasaranathan http://acharya.org/bk/pb/sbsn/dpasa.pdf