| article html file updated | 6 February 2020 12:18 CET | Update | https://www.mdpi.com/2079-3200/2/3/106 |
| article html file updated | 7 May 2019 08:10 CEST | Update | N/A |
| article html file updated | 22 March 2019 01:03 CET | Update | N/A |
| article html file updated | 20 August 2015 19:50 CEST | Original file | N/A |
| article pdf uploaded. | 25 September 2014 18:08 CEST | Updated version of record | https://www.mdpi.com/2079-3200/2/3/106/pdf |
| article pdf uploaded. | 18 September 2014 14:33 CEST | Version of Record | https://www.mdpi.com/2079-3200/2/3/106/pdf-vor |
