| article html file updated | 7 February 2020 04:09 CET | Update | https://www.mdpi.com/2077-0472/6/1/8 |
| article html file updated | 6 May 2019 01:12 CEST | Update | - |
| article html file updated | 26 March 2019 19:52 CET | Update | - |
| article html file updated | 28 March 2016 11:34 CEST | Original file | - |
| article pdf uploaded. | 2 February 2016 09:13 CET | Version of Record | https://www.mdpi.com/2077-0472/6/1/8/pdf |
| article xml uploaded. | 2 February 2016 09:13 CET | Original file | https://www.mdpi.com/2077-0472/6/1/8/xml |
