@article {30670,
	title = {New gomphaeschnids and progobiaeshnids from the Yixian Formation in Liaoning Province (China) illustrate the tremendous Upper Mesozoic diversity of the aeshnopteran dragonflies},
	journal = {Geobios},
	volume = {45},
	year = {2012},
	month = {2012},
	pages = {339-350},
	author = {Li, Yongjun and Andre Nel and D. Ren and Pang, Hong}
}
