About this article
Published Online: Apr 05, 2016
Page range: 229 - 238
Received: Jan 04, 2016
Accepted: Apr 05, 2016
DOI: https://doi.org/10.21042/AMNS.2016.1.00017
Keywords
© 2016 Jiahua Jin, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Jin, Jiahua
Library, Yunnan Normal UniversityKunming, P.R.China
School of Statistics and Mathematics, Yunnan University of Finance and EconomicsKunming, P.R.China