| article html file updated | 8 February 2020 16:54 CET | Update | https://www.mdpi.com/2218-1989/7/4/49 |
| article html file updated | 27 September 2019 07:29 CEST | Update | N/A |
| article html file updated | 3 May 2019 00:36 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:26 CET | Update | N/A |
| article html file updated | 25 September 2017 04:46 CEST | Original file | N/A |
| article xml uploaded. | 25 September 2017 04:45 CEST | Original file | https://www.mdpi.com/2218-1989/7/4/49/xml |
| article pdf uploaded. | 25 September 2017 04:45 CEST | Updated version of record | https://www.mdpi.com/2218-1989/7/4/49/pdf |
| article pdf uploaded. | 22 September 2017 15:56 CEST | Version of Record | https://www.mdpi.com/2218-1989/7/4/49/pdf-vor |
