by Qunfa, Yang, Ruyan, Zhou, Quanguo, Zhang, Junhe, Zhang
Published in International journal of global energy issues (01.01.2007)

by Qunfa, Yang, Fengming, Fan, Quanguo, Zhang
Published in International journal of global energy issues (2004)

by Yang Qunfa, Fan Zhenshan, Xu Guangyin
Published in Henan nongye daxue xuebao (01.03.2006)

by QUANGUO ZHANG, QUNFA YANG
Year of Publication 18.01.2006

by QUANGUO ZHANG, QUNFA YANG
Year of Publication 18.01.2006

by QUNFA YANG, SHENGYONG LIU
Year of Publication 05.07.2000

by LIU SHENGJIAN, LIU SHI, LI ZHI, TANG BAOYUE, LUO JIANWEN, YANG QUNFA, SHEN WENHUA, GUO YONGXIONG, XIA XIANLIANG, XIE FENG, ZHANG ZHENGPING
Year of Publication 11.03.2015

by QUANGUO ZHANG, QUNFA YANG, QIANHUI GUO
Year of Publication 28.09.2005

by QUANGUO ZHANG, QUNFA YANG, QIANHUI GUO
Year of Publication 29.06.2005

by QUANGUO ZHANG, QUNFA YANG, SHENGYONG LIU
Year of Publication 19.01.2005

by QUANGUO ZHANG, QUNFA YANG, QIANHUI GUO
Year of Publication 05.01.2005

by LI REN'AN, YANG QUNFA, YANG HANG
Year of Publication 20.08.2014

by QUANGUO ZHANG, QUNFA YANG, SHENGYONG LIU
Year of Publication 16.04.2003

by ZHANG XIANGFENG, YANG QUNFA, ZHANG QUANGUO, JIAO YOUZHOU
Year of Publication 18.12.2013

by ZHANG GUIPING, CHEN YONG, MA ZHAOWU, YANG QUNFA, GUO YONGXIONG, WU ZHIPENG, LI DONG
Year of Publication 08.02.2017

by QUANGUO ZHANG, QUNFA YANG, SHENGYONG LIU
Year of Publication 18.09.2002

by QUANGUO ZHANG, QUNFA YANG, SHENGYONG LIU
Year of Publication 31.07.2002

by SHENGYONG LIN, QUNFA YANG, QIANHUI GUO, BAILIANG ZHANG
Year of Publication 18.01.2006

by ZHANG XIANGFENG, YANG QUNFA, ZHANG QUANGUO, JIAO YOUZHOU
Year of Publication 17.04.2013

by YUSHUN TANG, QUNFA YANG, SHENGYONG LIU
Year of Publication 11.07.2001