| article html file updated | 8 February 2020 19:29 CET | Update | https://www.mdpi.com/2223-7747/6/4/53 |
| article html file updated | 28 September 2019 00:34 CEST | Update | N/A |
| article html file updated | 2 May 2019 18:53 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:18 CET | Update | N/A |
| article html file updated | 26 October 2017 08:55 CEST | Original file | N/A |
| article xml uploaded. | 26 October 2017 08:54 CEST | Original file | https://www.mdpi.com/2223-7747/6/4/53/xml |
| article pdf uploaded. | 26 October 2017 08:54 CEST | Version of Record | https://www.mdpi.com/2223-7747/6/4/53/pdf |
