| article html file updated | 8 February 2020 16:49 CET | Update | https://www.mdpi.com/2226-471X/2/4/18 |
| article html file updated | 3 May 2019 00:46 CEST | Update | - |
| article html file updated | 21 December 2018 02:52 CET | Update | - |
| article html file updated | 21 December 2018 02:52 CET | Update | - |
| article xml uploaded. | 21 December 2018 02:51 CET | Update | https://www.mdpi.com/2226-471X/2/4/18/xml |
| article xml uploaded. | 21 December 2018 02:51 CET | Update | - |
| article xml uploaded. | 27 November 2017 17:00 CET | Update | - |
| article pdf uploaded. | 27 November 2017 17:00 CET | Updated version of record | https://www.mdpi.com/2226-471X/2/4/18/pdf |
| article html file updated | 21 September 2017 14:32 CEST | Original file | - |
| article xml uploaded. | 21 September 2017 14:31 CEST | Update | - |
| article xml uploaded. | 21 September 2017 14:30 CEST | Original file | - |
| article pdf uploaded. | 21 September 2017 14:30 CEST | Version of Record | https://www.mdpi.com/2226-471X/2/4/18/pdf-vor |
