| article html file updated | 7 February 2020 22:44 CET | Update | https://www.mdpi.com/2077-0472/7/2/8 |
| article html file updated | 23 September 2019 04:16 CEST | Update | - |
| article html file updated | 4 May 2019 12:35 CEST | Update | - |
| article html file updated | 28 February 2017 10:52 CET | Update | - |
| article html file updated | 7 February 2017 11:36 CET | Update | - |
| article xml uploaded. | 7 February 2017 11:35 CET | Original file | https://www.mdpi.com/2077-0472/7/2/8/xml |
| article pdf uploaded. | 7 February 2017 11:35 CET | Updated version of record | https://www.mdpi.com/2077-0472/7/2/8/pdf |
| article html file updated | 7 February 2017 04:59 CET | Original file | - |
| article pdf uploaded. | 6 February 2017 10:32 CET | Version of Record | https://www.mdpi.com/2077-0472/7/2/8/pdf-vor |
