| article html file updated | 7 February 2020 06:56 CET | Update | https://www.mdpi.com/2220-9964/5/4/48 |
| article html file updated | 5 May 2019 19:23 CEST | Update | - |
| article html file updated | 27 March 2019 01:14 CET | Update | - |
| article html file updated | 27 April 2016 10:21 CEST | Update | - |
| article html file updated | 7 April 2016 09:49 CEST | Original file | - |
| article xml uploaded. | 7 April 2016 09:48 CEST | Original file | https://www.mdpi.com/2220-9964/5/4/48/xml |
| article pdf uploaded. | 7 April 2016 09:48 CEST | Version of Record | https://www.mdpi.com/2220-9964/5/4/48/pdf |
