| article html file updated | 8 February 2020 07:57 CET | Update | https://www.mdpi.com/2227-7080/5/2/33 |
| article html file updated | 25 September 2019 06:40 CEST | Update | - |
| article html file updated | 3 May 2019 18:05 CEST | Update | - |
| article html file updated | 29 June 2017 11:57 CEST | Update | - |
| article html file updated | 10 June 2017 10:08 CEST | Original file | - |
| article xml uploaded. | 10 June 2017 10:06 CEST | Update | https://www.mdpi.com/2227-7080/5/2/33/xml |
| article pdf uploaded. | 10 June 2017 10:06 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/2/33/pdf |
