Kane Pandurang Vaman. History of Dharmasastra (Ancient and Medieval Religious and Civil Law). Volume 1

Poona: Bhandarkar Oriental Research Institute, 1930. — 816 p.Mr. Batakrishna Ghose has an exhaustive note of the mutual relations of Gautama, Baudhayana and Apastamba. He holds that Gautama
is not the oldest extant author, that Ap. and Gautama stand in the same relations as Manu and Yajnavalkya, that Baudhayana-dharmasutra
is not older than Apastambadharmasutra, that the reference to the views of some in Gautama 15. 30 may easily be to Ap. Dh. S. II. 7. 21.