| article html file updated | 8 February 2020 04:06 CET | Update | https://www.mdpi.com/2227-7080/5/2/18 |
| article html file updated | 24 September 2019 10:44 CEST | Update | - |
| article html file updated | 4 May 2019 01:15 CEST | Update | - |
| article html file updated | 29 June 2017 11:54 CEST | Update | - |
| article html file updated | 25 April 2017 03:16 CEST | Original file | - |
| article xml uploaded. | 25 April 2017 03:14 CEST | Original file | https://www.mdpi.com/2227-7080/5/2/18/xml |
| article pdf uploaded. | 25 April 2017 03:14 CEST | Updated version of record | https://www.mdpi.com/2227-7080/5/2/18/pdf |
| article pdf uploaded. | 21 April 2017 16:42 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/2/18/pdf-vor |
