| article html file updated | 8 February 2020 00:31 CET | Update | https://www.mdpi.com/2227-7072/5/1/9 |
| article html file updated | 23 September 2019 14:22 CEST | Update | N/A |
| article html file updated | 4 May 2019 08:50 CEST | Update | N/A |
| article html file updated | 29 March 2017 10:27 CEST | Update | N/A |
| article html file updated | 1 March 2017 10:46 CET | Original file | N/A |
| article xml uploaded. | 1 March 2017 10:36 CET | Original file | https://www.mdpi.com/2227-7072/5/1/9/xml |
| article pdf uploaded. | 1 March 2017 10:36 CET | Version of Record | https://www.mdpi.com/2227-7072/5/1/9/pdf |
