| article html file updated | 7 February 2020 14:06 CET | Update | https://www.mdpi.com/2220-9964/5/9/156 |
| article html file updated | 5 May 2019 05:43 CEST | Update | - |
| article html file updated | 27 March 2019 15:15 CET | Update | - |
| article html file updated | 27 September 2016 09:39 CEST | Update | - |
| article html file updated | 30 August 2016 09:36 CEST | Original file | - |
| article xml uploaded. | 30 August 2016 09:34 CEST | Update | https://www.mdpi.com/2220-9964/5/9/156/xml |
| article xml uploaded. | 30 August 2016 09:34 CEST | Original file | - |
| article pdf uploaded. | 30 August 2016 09:34 CEST | Version of Record | https://www.mdpi.com/2220-9964/5/9/156/pdf |
