| article html file updated | 8 February 2020 07:30 CET | Update | https://www.mdpi.com/2077-0375/7/2/28 |
| article html file updated | 25 September 2019 04:22 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:55 CEST | Update | N/A |
| article html file updated | 29 June 2017 11:38 CEST | Update | N/A |
| article pdf uploaded. | 22 June 2017 11:38 CEST | Updated version of record | https://www.mdpi.com/2077-0375/7/2/28/pdf |
| article html file updated | 5 June 2017 11:58 CEST | Original file | N/A |
| article xml uploaded. | 5 June 2017 11:57 CEST | Original file | https://www.mdpi.com/2077-0375/7/2/28/xml |
| article pdf uploaded. | 5 June 2017 11:57 CEST | Version of Record | https://www.mdpi.com/2077-0375/7/2/28/pdf-vor |
