Susan Grove Eastman, “Israel and the Mercy of God: A Re-reading of Galatians 6.16 and Romans 9-11.” New Testament Studies. 56:3 (2010): 367-395.
Eastman argues that in Galatians 6:16 and Romans 9-11 “Israel” refers to the Jews. You can read a short abstract of this article online.
This article is an expansion of her recent essay on this same topic:
Susan Grove Eastman, “Israel and Divine Mercy in Galatians and Romans.” In, Between Gospel and Election: Explorations in the Interpretation of Romans 9–11. Edited by Florian Wilk and J. Ross Wagner with the assistance of Frank Schleritt. WUNT. Tübingen: J. C. B. Möhr, 2010. ?-?.