Affiliation: | 1.LAREMA, University of Angers, 2 Boulevard Lavoisier, 49045, Angers Cedex 01, France ;2.Graduate School of Mathematics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan ;3.School of Statistics and Actuarial Science, University of the Witwatersrand, Private Bag X3, Wits, Johannesburg, 2050, South Africa ; |