| article html file updated | 8 February 2020 00:08 CET | Update | https://www.mdpi.com/2311-5521/2/1/9 |
| article html file updated | 23 September 2019 12:10 CEST | Update | - |
| article html file updated | 4 May 2019 09:43 CEST | Update | - |
| article html file updated | 27 October 2017 10:06 CEST | Update | - |
| article html file updated | 24 February 2017 12:29 CET | Original file | - |
| article xml uploaded. | 24 February 2017 12:27 CET | Update | https://www.mdpi.com/2311-5521/2/1/9/xml |
| article xml uploaded. | 24 February 2017 12:27 CET | Original file | - |
| article pdf uploaded. | 24 February 2017 12:27 CET | Updated version of record | https://www.mdpi.com/2311-5521/2/1/9/pdf |
| article pdf uploaded. | 23 February 2017 14:33 CET | Version of Record | https://www.mdpi.com/2311-5521/2/1/9/pdf-vor |
