| article html file updated | 5 February 2020 12:18 CET | Update | https://www.mdpi.com/1996-1073/2/2/411 |
| article html file updated | 9 May 2019 11:15 CEST | Update | N/A |
| article html file updated | 19 March 2019 18:42 CET | Update | N/A |
| article html file updated | 9 August 2017 09:07 CEST | Original file | N/A |
| article xml uploaded. | 9 August 2017 09:06 CEST | Update | https://www.mdpi.com/1996-1073/2/2/411/xml |
