| article html file updated | 7 February 2020 23:07 CET | Update | https://www.mdpi.com/2226-4310/4/1/7 |
| article html file updated | 23 September 2019 06:28 CEST | Update | - |
| article html file updated | 4 May 2019 11:47 CEST | Update | - |
| article html file updated | 29 March 2017 05:57 CEST | Update | - |
| article html file updated | 23 February 2017 07:19 CET | Original file | - |
| article xml uploaded. | 23 February 2017 07:17 CET | Update | https://www.mdpi.com/2226-4310/4/1/7/xml |
| article xml uploaded. | 23 February 2017 07:17 CET | Original file | - |
| article pdf uploaded. | 23 February 2017 07:17 CET | Updated version of record | https://www.mdpi.com/2226-4310/4/1/7/pdf |
| article pdf uploaded. | 10 February 2017 15:43 CET | Version of Record | https://www.mdpi.com/2226-4310/4/1/7/pdf-vor |
