Concerning the Traditio in the Scope of the Problem of the Risks in the Purchase-and-Sell. The Cases of the "sold Beds" (Paul., 3 Alf. Epit., D. 18, 6,13 E 15 pr.) and the "bought Wood" (Paul., 3 Alf. Epit., D. 18, 6,15,1). Rev. Fac. Direito Univ. São Paulo 2004, 99, 37-60.