| article html file updated | 9 February 2020 07:05 CET | Update | https://www.mdpi.com/2227-7102/8/1/27 |
| article html file updated | 30 September 2019 21:56 CEST | Update | - |
| article html file updated | 1 May 2019 17:28 CEST | Update | - |
| article html file updated | 17 April 2019 16:50 CEST | Update | - |
| article html file updated | 29 March 2019 00:17 CET | Update | - |
| article html file updated | 27 March 2018 15:21 CEST | Update | - |
| article html file updated | 24 February 2018 07:00 CET | Original file | - |
| article xml uploaded. | 24 February 2018 06:58 CET | Original file | https://www.mdpi.com/2227-7102/8/1/27/xml |
| article pdf uploaded. | 24 February 2018 06:58 CET | Updated version of record | https://www.mdpi.com/2227-7102/8/1/27/pdf |
| article pdf uploaded. | 20 February 2018 14:23 CET | Version of Record | https://www.mdpi.com/2227-7102/8/1/27/pdf-vor |
