Penglai Zircon Megacrysts: A Potential New Working Reference Material for Microbeam Determination of Hf-O Isotopes and U--Pb Age - Li, X.; Long, W.; Li, Q.; Liu, Y.; Zheng, Y.; Yang, Y.; Chamberlain, K.; Wan, D.; Wang, Xuan-Ce; Guo, C. (Blackwell Publishing, 2010)