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Submitted by Julio Heber Camargo Silva (julioheber@yahoo. com. br) on 2018-03-29T19: 46: 29Z No. of bitstreams: 2 Artigo - Yves Carlier - 2011. pdf: 79824 bytes, checksum: cb14de2d74db8b60a2571ceb387f3ae9 (MD5) licenseᵣdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Carlier et al. (Tue,) studied this question.