| article html file updated | 7 February 2020 03:10 CET | Update | https://www.mdpi.com/2075-4701/6/1/13 |
| article html file updated | 6 May 2019 03:05 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:56 CET | Original file | N/A |
| article pdf uploaded. | 7 January 2016 16:37 CET | Version of Record | https://www.mdpi.com/2075-4701/6/1/13/pdf |
| article xml uploaded. | 7 January 2016 16:37 CET | Original file | https://www.mdpi.com/2075-4701/6/1/13/xml |
