“…Figure 6 describes these phases and the total axial force pattern due to the penetration of the needle. These models have still been used in recent works such as [7,11,13,13,14,[24][25][26][27][28][29][30][31][32][33][34]. Recently, works focused on the ability to render multiple layers of tissues, using piece-wise exponential models [13] or nested boxes [25] rendering each one its stiffness and cutting forces according to [35].…”