| article html file updated | 7 February 2020 04:48 CET | Update | https://www.mdpi.com/1996-1073/9/2/98 |
| article html file updated | 5 May 2019 23:47 CEST | Update | N/A |
| article html file updated | 26 March 2019 21:14 CET | Original file | N/A |
| article pdf uploaded. | 19 February 2016 17:05 CET | Version of Record | https://www.mdpi.com/1996-1073/9/2/98/pdf |
| article xml uploaded. | 19 February 2016 17:05 CET | Original file | https://www.mdpi.com/1996-1073/9/2/98/xml |
