| article html file updated | 7 February 2020 07:52 CET | Update | https://www.mdpi.com/2226-4310/3/2/13 |
| article html file updated | 5 May 2019 17:25 CEST | Update | - |
| article html file updated | 27 March 2019 03:07 CET | Update | - |
| article html file updated | 27 June 2016 12:07 CEST | Update | - |
| article html file updated | 27 April 2016 11:39 CEST | Original file | - |
| article xml uploaded. | 27 April 2016 11:23 CEST | Update | https://www.mdpi.com/2226-4310/3/2/13/xml |
| article pdf uploaded. | 27 April 2016 11:23 CEST | Version of Record | https://www.mdpi.com/2226-4310/3/2/13/pdf |
