Chemostratigraphy and cyclostratigraphy of the Ordovician Liangjiashan section from Shimenzhai of Qinhuangdao in North China.
MA Kunyuan, LI Ruochen, GONG Yiming.
Earth Science Frontiers . 2016, (6): 268 -286 .  DOI: 10.13745/j.esf.2016.06.019