Seismic characteristics, distribution and origin of shallow gas on the continental shelf offshore the Pearl River Estuary, northern South China Sea - Jian Li; Wei Li; Tiago M. Alves; Yingci Feng; Jie Sun; Yantao Yao; Jiaxian Huang; Pin Wang; Qinqin Tang; Wenhuan Zhan (Marine Geology, 2026)