| article html file updated | 7 February 2020 07:20 CET | Update | https://www.mdpi.com/2218-273X/6/2/20 |
| article html file updated | 5 May 2019 18:30 CEST | Update | N/A |
| article html file updated | 27 March 2019 02:01 CET | Update | N/A |
| article html file updated | 27 June 2016 08:05 CEST | Update | N/A |
| article html file updated | 15 April 2016 12:11 CEST | Original file | N/A |
| article xml uploaded. | 15 April 2016 12:10 CEST | Original file | https://www.mdpi.com/2218-273X/6/2/20/xml |
| article pdf uploaded. | 15 April 2016 12:10 CEST | Version of Record | https://www.mdpi.com/2218-273X/6/2/20/pdf |
