| article html file updated | 9 February 2020 00:47 CET | Update | https://www.mdpi.com/2226-471X/2/4/28 |
| article html file updated | 29 September 2019 09:20 CEST | Update | - |
| article html file updated | 2 May 2019 07:02 CEST | Update | - |
| article html file updated | 18 April 2019 04:56 CEST | Update | - |
| article html file updated | 28 March 2019 10:08 CET | Update | - |
| article html file updated | 21 December 2017 17:33 CET | Original file | - |
| article xml uploaded. | 21 December 2017 17:32 CET | Original file | https://www.mdpi.com/2226-471X/2/4/28/xml |
| article pdf uploaded. | 21 December 2017 17:32 CET | Version of Record | https://www.mdpi.com/2226-471X/2/4/28/pdf |
