| article html file updated | 7 February 2020 21:59 CET | Update | https://www.mdpi.com/2076-3271/5/1/4 |
| article html file updated | 23 September 2019 00:15 CEST | Update | - |
| article html file updated | 4 May 2019 14:03 CEST | Update | - |
| article html file updated | 22 January 2017 12:39 CET | Update | - |
| article xml uploaded. | 22 January 2017 12:38 CET | Update | https://www.mdpi.com/2076-3271/5/1/4/xml |
| article pdf uploaded. | 22 January 2017 12:38 CET | Updated version of record | https://www.mdpi.com/2076-3271/5/1/4/pdf |
| article html file updated | 22 January 2017 10:51 CET | Original file | - |
| article xml uploaded. | 22 January 2017 10:50 CET | Original file | - |
| article pdf uploaded. | 22 January 2017 10:50 CET | Version of Record | - |
