| article html file updated | 7 February 2020 06:39 CET | Update | https://www.mdpi.com/2227-7072/4/2/6 |
| article html file updated | 5 May 2019 19:57 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:43 CET | Update | N/A |
| article html file updated | 1 July 2016 12:00 CEST | Update | N/A |
| article html file updated | 30 March 2016 13:44 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2016 13:43 CEST | Original file | https://www.mdpi.com/2227-7072/4/2/6/xml |
| article pdf uploaded. | 30 March 2016 13:43 CEST | Version of Record | https://www.mdpi.com/2227-7072/4/2/6/pdf |
