| article html file updated | 7 February 2020 07:25 CET | Update | https://www.mdpi.com/2077-0472/6/2/17 |
| article html file updated | 5 May 2019 18:19 CEST | Update | N/A |
| article html file updated | 27 March 2019 02:11 CET | Update | N/A |
| article html file updated | 27 June 2016 12:13 CEST | Update | N/A |
| article html file updated | 18 April 2016 11:43 CEST | Original file | N/A |
| article xml uploaded. | 18 April 2016 11:41 CEST | Original file | https://www.mdpi.com/2077-0472/6/2/17/xml |
| article pdf uploaded. | 18 April 2016 11:41 CEST | Version of Record | https://www.mdpi.com/2077-0472/6/2/17/pdf |
