Plans of S. Pedro (Mataloto, 2010) and Porto das Carretas (Soares e Silva, 2010). References in the page of W.E. Bibliography.
I recently defended (Valera, 2014) that during the second half of the 3rd millennium BC walled enclosures are no longer built in Alentejo. Some may still be in use during the third quarter, others are abandoned, others present bell beaker reoccupations, but there is no record of the building of new wall enclosures.
According the actual available data, in the long duration of the building of enclosures and monumental architectures in South Portugal, the construction of walled enclosures are a late adding (first centuries of the 3rd millennium) and seem to have a relatively ephemeral life, with the activity of building walls ending by the middle of the millennium.
Valera, A.C. (2014), “Continuidades e descontinuidades entre o 3º e a primeira metade do 2º milénio a.n.e. no Sul de Portugal: alguns apontamentos em tempos de acelerada mudança.”, Antrope, 1, Tomar, IPT, p. 298-316.