Systolic Arrays with Embedded Tree Structures for Connectivity Problems. - Sunil Ashtaputre; Carla D. Savage (IEEE Trans. Computers, 1985)

A New Faster Algorithm for Iterative Placement Improvement. - Moazzem Hossain; Bala Thumma; Sunil Ashtaputre (Great Lakes Symposium on VLSI, 1996)