| article html file updated | 7 February 2020 23:03 CET | Update | https://www.mdpi.com/2076-3425/7/2/18 |
| article html file updated | 23 September 2019 06:09 CEST | Update | - |
| article html file updated | 4 May 2019 11:54 CEST | Update | - |
| article html file updated | 2 March 2017 08:51 CET | Update | - |
| article html file updated | 10 February 2017 10:52 CET | Original file | - |
| article xml uploaded. | 10 February 2017 10:51 CET | Original file | https://www.mdpi.com/2076-3425/7/2/18/xml |
| article pdf uploaded. | 10 February 2017 10:51 CET | Version of Record | https://www.mdpi.com/2076-3425/7/2/18/pdf |
