| article html file updated | 7 February 2020 06:22 CET | Update | https://www.mdpi.com/1996-1073/9/4/238 |
| article html file updated | 5 May 2019 20:30 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:16 CET | Update | N/A |
| article html file updated | 28 April 2016 07:49 CEST | Update | N/A |
| article pdf uploaded. | 25 March 2016 09:07 CET | Updated version of record | https://www.mdpi.com/1996-1073/9/4/238/pdf |
| article html file updated | 25 March 2016 08:54 CET | Original file | N/A |
| article xml uploaded. | 25 March 2016 08:53 CET | Original file | https://www.mdpi.com/1996-1073/9/4/238/xml |
