| article html file updated | 7 February 2020 22:30 CET | Update | https://www.mdpi.com/2075-4701/7/2/39 |
| article html file updated | 23 September 2019 03:03 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:02 CEST | Update | N/A |
| article html file updated | 1 March 2017 03:43 CET | Update | N/A |
| article html file updated | 14 February 2017 03:13 CET | Original file | N/A |
| article xml uploaded. | 14 February 2017 03:12 CET | Original file | https://www.mdpi.com/2075-4701/7/2/39/xml |
| article pdf uploaded. | 14 February 2017 03:12 CET | Updated version of record | https://www.mdpi.com/2075-4701/7/2/39/pdf |
| article pdf uploaded. | 30 January 2017 17:00 CET | Version of Record | https://www.mdpi.com/2075-4701/7/2/39/pdf-vor |
