“…In Sadallah [18], the same problem has been studied for a 2 -parabolic operator in the case of one space variable. Further references on the analysis of parabolic problems in non-cylindrical domains are: Savaré [19], Aref'ev and Bagirov [3], Ho mann and Lewis [8], Labbas, Medeghri and Sadallah [13,14], Alkhutov [1,2] and Khelou et al [9][10][11][12]. There are many other works concerning boundary-value problems in non-smooth domains (see, for example, Grisvard [7] and the references therein).…”