| article html file updated | 7 February 2020 04:08 CET | Update | https://www.mdpi.com/2075-4418/6/1/8 |
| article html file updated | 6 May 2019 01:15 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:50 CET | Update | N/A |
| article html file updated | 28 March 2016 11:27 CEST | Original file | N/A |
| article xml uploaded. | 1 February 2016 10:59 CET | Original file | https://www.mdpi.com/2075-4418/6/1/8/xml |
| article pdf uploaded. | 1 February 2016 10:59 CET | Version of Record | https://www.mdpi.com/2075-4418/6/1/8/pdf |
