| article html file updated | 7 February 2020 06:44 CET | Update | https://www.mdpi.com/1996-1073/9/4/262 |
| article html file updated | 5 May 2019 19:46 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:52 CET | Update | N/A |
| article html file updated | 28 April 2016 07:53 CEST | Update | N/A |
| article html file updated | 1 April 2016 11:30 CEST | Original file | N/A |
| article xml uploaded. | 1 April 2016 11:29 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/262/xml |
| article pdf uploaded. | 1 April 2016 11:29 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/262/pdf |
