SSD: Single Shot MultiBox Detector, Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian Szegedy, Scott Reed, Cheng-Yang Fu, and Alexander C. Berg, 2016European Conference on Computer Vision (ECCV)DOI: 10.1007/978-3-319-46448-0_2 - This work established a popular single-stage object detection framework that effectively used predefined 'default boxes' (anchor boxes) at multiple feature map layers for detecting objects across various scales.