TY - RPRT TI - Optimizing distal landmarks: horizontal versus vertical structures and relation to background. AU - A S Etienne AU - S Joris-Lambert AU - R Maurer AU - B Reverdin AU - S Sitbon PY - 1995 DO - 10.1016/0166-4328(94)00165-c UR - https://pubmed.ncbi.nlm.nih.gov/7619303/ ID - 7619303 ER -