| article html file updated | 7 February 2020 19:54 CET | Update | https://www.mdpi.com/2075-5309/6/4/52 |
| article html file updated | 22 September 2019 13:03 CEST | Update | N/A |
| article html file updated | 4 May 2019 18:37 CEST | Update | N/A |
| article html file updated | 29 December 2016 06:13 CET | Update | N/A |
| article html file updated | 19 December 2016 08:39 CET | Original file | N/A |
| article xml uploaded. | 19 December 2016 08:38 CET | Original file | https://www.mdpi.com/2075-5309/6/4/52/xml |
| article pdf uploaded. | 19 December 2016 08:38 CET | Version of Record | https://www.mdpi.com/2075-5309/6/4/52/pdf |
