“…Moreover, as demonstrated by Ventura et al 26 , if the position of the nucleation sites are arranged periodically or approaching a periodic arrangement, the impingement takes place later, and the contiguity lies below the dashed line 26 . When the growing regions are ellipsoids, their contiguity still falls on the dashed line provided that their nucleation sites nuclei are located in space according to a homogeneous Poisson point process 16,17 .…”