can be seen as “weak links” [10] between modules. Weak links have been shown to offer stability in networks [10]. Figure 4 shows an example MRBN. Thus, the total number of nodes N$_{T}$ of a MRBN is given by Figure 4: Topology of a example MRBN with N = 5, M = 4, K = 2, L = 1. Each module is similar to the example RBN shown in Figure 1, with one additional input per module (dashed arrows). Modules can have several or no outputs. and the total number of links T is given by since each of the M modules has 〈 L 〉 inputs and N nodes with 〈 K 〉 intramodular inputs. N$_{T}$ = N · M (2) T = M · ( 〈 K 〉 · N + 〈 L 〉 ) (3) 8