| article html file updated | 7 February 2020 20:31 CET | Update | https://www.mdpi.com/2075-5309/7/1/4 |
| article html file updated | 22 September 2019 16:23 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:22 CEST | Update | N/A |
| article html file updated | 29 March 2017 09:36 CEST | Update | N/A |
| article html file updated | 30 December 2016 02:52 CET | Original file | N/A |
| article xml uploaded. | 30 December 2016 02:50 CET | Update | https://www.mdpi.com/2075-5309/7/1/4/xml |
| article xml uploaded. | 30 December 2016 02:50 CET | Original file | N/A |
| article pdf uploaded. | 30 December 2016 02:50 CET | Version of Record | https://www.mdpi.com/2075-5309/7/1/4/pdf |
