| article html file updated | 8 February 2020 02:48 CET | Update | https://www.mdpi.com/2227-9040/5/2/13 |
| article html file updated | 4 May 2019 03:49 CEST | Update | - |
| article html file updated | 28 June 2017 12:51 CEST | Update | - |
| article html file updated | 4 April 2017 12:03 CEST | Original file | - |
| article xml uploaded. | 4 April 2017 12:02 CEST | Original file | https://www.mdpi.com/2227-9040/5/2/13/xml |
| article pdf uploaded. | 4 April 2017 12:02 CEST | Updated version of record | https://www.mdpi.com/2227-9040/5/2/13/pdf |
| article pdf uploaded. | 2 April 2017 10:14 CEST | Version of Record | https://www.mdpi.com/2227-9040/5/2/13/pdf-vor |
