| article html file updated | 7 February 2020 04:17 CET | Update | https://www.mdpi.com/2075-4418/6/1/9 |
| article html file updated | 6 May 2019 00:57 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:08 CET | Update | N/A |
| article html file updated | 28 March 2016 11:27 CEST | Original file | N/A |
| article pdf uploaded. | 4 February 2016 12:04 CET | Version of Record | https://www.mdpi.com/2075-4418/6/1/9/pdf |
| article xml uploaded. | 4 February 2016 12:04 CET | Original file | https://www.mdpi.com/2075-4418/6/1/9/xml |
