Source: https://www.researchgate.net/profile/Costantino-Creton/publication/248923099_Direct_Observation_of_Cavitation_and_Fibrillation_in_a_Probe_Tack_Experiment_on_Model_Acrylic_Pressure-Sensitive-Adhesives/links/53d2043b0cf2a7fbb2e95df2/Direct-Observation-of-Cavitation-and-Fibrillation-in-a-Probe-Tack-Experiment-on-Model-Acrylic-Pressure-Sensitive-Adhesives.pdf