| article html file updated | 8 February 2020 07:16 CET | Update | https://www.mdpi.com/2218-1989/7/2/23 |
| article html file updated | 25 September 2019 03:09 CEST | Update | N/A |
| article html file updated | 3 May 2019 19:23 CEST | Update | N/A |
| article html file updated | 28 June 2017 13:52 CEST | Update | N/A |
| article html file updated | 7 June 2017 13:05 CEST | Original file | N/A |
| article xml uploaded. | 7 June 2017 13:04 CEST | Update | https://www.mdpi.com/2218-1989/7/2/23/xml |
| article pdf uploaded. | 2 June 2017 09:31 CEST | Version of Record | https://www.mdpi.com/2218-1989/7/2/23/pdf |
