| article html file updated | 8 February 2020 04:17 CET | Update | https://www.mdpi.com/2223-7747/6/2/17 |
| article html file updated | 24 September 2019 11:45 CEST | Update | N/A |
| article html file updated | 4 May 2019 00:55 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:46 CEST | Update | N/A |
| article html file updated | 24 April 2017 15:27 CEST | Original file | N/A |
| article xml uploaded. | 24 April 2017 15:25 CEST | Original file | https://www.mdpi.com/2223-7747/6/2/17/xml |
| article pdf uploaded. | 24 April 2017 15:25 CEST | Version of Record | https://www.mdpi.com/2223-7747/6/2/17/pdf |
