作者单位:
Osnabruck Univ, Inst Environm Syst Res, Sch Math Comp Sci, Barbarastr 12, D-49076 Osnabruck, Germany
[1]
Univ Pompeu Fabra, Dept Econ & Empresa, C Ramon Trias Fargas 25-27, Barcelona 08005, Spain
[2]
UNED, Dept Matemat Aplicada, ETSI Ind, C Juan del Rosal 12, Madrid 28040, Spain
[3]
发布时间
2020-06-04