| article html file updated | 6 February 2020 23:03 CET | Update | https://www.mdpi.com/2227-7102/5/3/238 |
| article html file updated | 6 May 2019 10:49 CEST | Update | N/A |
| article html file updated | 26 March 2019 11:13 CET | Update | N/A |
| article html file updated | 27 October 2017 09:22 CEST | Original file | N/A |
| article pdf uploaded. | 21 September 2015 14:14 CEST | Version of Record | https://www.mdpi.com/2227-7102/5/3/238/pdf |
