| article html file updated | 7 February 2020 05:55 CET | Update | https://www.mdpi.com/2076-3425/6/1/9 |
| article html file updated | 21 September 2019 13:08 CEST | Update | N/A |
| article html file updated | 5 May 2019 21:24 CEST | Update | N/A |
| article html file updated | 26 March 2019 23:31 CET | Update | N/A |
| article html file updated | 29 March 2016 11:12 CEST | Original file | N/A |
| article xml uploaded. | 15 March 2016 11:12 CET | Original file | https://www.mdpi.com/2076-3425/6/1/9/xml |
| article pdf uploaded. | 15 March 2016 11:12 CET | Version of Record | https://www.mdpi.com/2076-3425/6/1/9/pdf |
