| article html file updated | 7 February 2020 06:40 CET | Update | https://www.mdpi.com/2071-1050/8/4/321 |
| article html file updated | 5 May 2019 19:53 CEST | Update | - |
| article html file updated | 27 March 2019 00:46 CET | Update | - |
| article html file updated | 29 April 2016 05:46 CEST | Update | - |
| article html file updated | 31 March 2016 09:49 CEST | Original file | - |
| article xml uploaded. | 31 March 2016 09:48 CEST | Original file | https://www.mdpi.com/2071-1050/8/4/321/xml |
| article pdf uploaded. | 31 March 2016 09:48 CEST | Version of Record | https://www.mdpi.com/2071-1050/8/4/321/pdf |
