| article html file updated | 8 February 2020 03:40 CET | Update | https://www.mdpi.com/2227-9032/5/2/20 |
| article html file updated | 24 September 2019 08:11 CEST | Update | - |
| article html file updated | 4 May 2019 02:05 CEST | Update | - |
| article html file updated | 30 June 2017 05:39 CEST | Update | - |
| article html file updated | 17 April 2017 12:19 CEST | Original file | - |
| article xml uploaded. | 17 April 2017 12:18 CEST | Original file | https://www.mdpi.com/2227-9032/5/2/20/xml |
| article pdf uploaded. | 17 April 2017 12:18 CEST | Updated version of record | https://www.mdpi.com/2227-9032/5/2/20/pdf |
| article pdf uploaded. | 15 April 2017 07:08 CEST | Version of Record | https://www.mdpi.com/2227-9032/5/2/20/pdf-vor |
