[1] IME-USP,
[2] Caixa Postal 66.281¶05311-970,undefined
[3] São Paulo,undefined
[4] SP¶BRASIL,undefined
[5] IMA,undefined
[6] EPFL¶Lausanne,undefined
[7] CH 1015¶SUISSE,undefined
[8] IMECC-UNICAMP,undefined
[9] Caixa Postal 6065¶13053-970,undefined
[10] Campinas,undefined
[11] SP,undefined
[12] BRASIL,undefined
[13] Dep. of Mathematics,undefined
[14] SUNY,undefined
[15] College at New Paltz,undefined
[16] NY,undefined
[17] 12561,undefined
[18] USA,undefined
[19] CNRS,undefined
[20] UMR 6085,undefined
[21] Univ. Rouen,undefined
[22] Site Colbert,undefined
[23] 76821 Mont Saint Aignan,undefined
[24] Cedex,undefined
[25] FRANCE,undefined