Book in Tamil by Sri U Ve M K Rangachariar Swami Tamil Translation of Bhagavad Ramanuja’s Gita Bhashyam http://acharya.org/bk/pb/mkr/sgb-mkr.pdf
Srimad Bhagavad Gita and Vishnu Sahasranama
Book in Sanskrit by Gita Press http://acharya.org/bk/pb/misc/sbg-vsn-gp.pdf
Isavasya Upanishadhil Sila Visesha Vishayangal
Article in Tamil http://acharya.org/ar/misc/iusvv.pdf
Kathopanishad Commentary
Book in Tamil http://acharya.org/bk/pb/Vyakhyanam/kathauvt.pdf
Prashnopanishad Commentary
Book in Tamil http://acharya.org/bk/pb/Vyakhyanam/prashnauvt.pdf