| article html file updated | 9 February 2020 02:59 CET | Update | https://www.mdpi.com/2227-9709/5/1/6 |
| article html file updated | 29 September 2019 21:35 CEST | Update | N/A |
| article html file updated | 2 May 2019 02:24 CEST | Update | N/A |
| article html file updated | 18 April 2019 00:38 CEST | Update | N/A |
| article html file updated | 28 March 2019 15:23 CET | Update | N/A |
| article html file updated | 27 March 2018 15:26 CEST | Update | N/A |
| article html file updated | 13 January 2018 11:19 CET | Original file | N/A |
| article xml uploaded. | 13 January 2018 11:18 CET | Original file | https://www.mdpi.com/2227-9709/5/1/6/xml |
| article pdf uploaded. | 13 January 2018 11:18 CET | Version of Record | https://www.mdpi.com/2227-9709/5/1/6/pdf |
