| article html file updated | 7 February 2020 04:11 CET | Update | https://www.mdpi.com/2075-4418/6/1/7 |
| article html file updated | 6 May 2019 01:10 CEST | Update | - |
| article html file updated | 26 March 2019 19:54 CET | Update | - |
| article html file updated | 28 March 2016 11:27 CEST | Original file | - |
| article xml uploaded. | 2 February 2016 09:44 CET | Original file | https://www.mdpi.com/2075-4418/6/1/7/xml |
| article pdf uploaded. | 2 February 2016 09:44 CET | Version of Record | https://www.mdpi.com/2075-4418/6/1/7/pdf |
