Error Analysis for Quadtree Image Formation. - Lance M. Kaplan; Seung-Mok Oh; Matthew Cobb; James H. McClellan (ICIP, 2000)

Multiresolution Quadtree Beamformer. - Seung-Mok Oh; James H. McClellan (ICASSP, 2002)

Pruned Multiangle Resolution Fast Beamforming. - Yeo-Sun Yoon; Lance M. Kaplan; Seung-Mok Oh; James H. McClellan (EURASIP J. Adv. Signal Process., 2008)