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
Article in Tamil http://acharya.org/ar/misc/iusvv.pdf
Book in Tamil http://acharya.org/bk/pb/Vyakhyanam/kathauvt.pdf
Book in Tamil http://acharya.org/bk/pb/Vyakhyanam/prashnauvt.pdf