Stem placehold$ (all stems)
2 papers:
ECOOP-2013-ServettoMPN #composition- The Billion-Dollar Fix — Safe Modular Circular Initialisation with Placeholders and Placeholder Types (MS, JM, AP, JN), pp. 205–229.
CHI-2010-KernMS #named #visual notation- Gazemarks: gaze-based visual placeholders to ease attention switching (DK, PM, AS), pp. 2093–2102.