| article html file updated | 7 February 2020 20:28 CET | Update | https://www.mdpi.com/2073-4352/7/1/4 |
| article html file updated | 22 September 2019 16:10 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:27 CEST | Update | N/A |
| article html file updated | 7 February 2017 04:02 CET | Update | N/A |
| article html file updated | 29 December 2016 11:13 CET | Original file | N/A |
| article xml uploaded. | 29 December 2016 11:11 CET | Original file | https://www.mdpi.com/2073-4352/7/1/4/xml |
| article pdf uploaded. | 29 December 2016 11:11 CET | Version of Record | https://www.mdpi.com/2073-4352/7/1/4/pdf |
