Han, Lei
Zhu, Huili
Zhao, Yonghua
Liu, Zhao
Funding for this research was provided by:
Natural Science Basic Research Plan (2017JM4036)
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS (SKLLQG1507)
Fundamental Research Funds for the Central Universities (310826171010)
Article History
Received: 9 November 2017
Accepted: 23 June 2018
First Online: 28 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.