| article html file updated | 7 February 2020 04:15 CET | Update | https://www.mdpi.com/2076-0787/5/1/12 |
| article html file updated | 6 May 2019 01:01 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:04 CET | Original file | N/A |
| article xml uploaded. | 4 February 2016 10:22 CET | Original file | https://www.mdpi.com/2076-0787/5/1/12/xml |
| article pdf uploaded. | 4 February 2016 10:22 CET | Version of Record | https://www.mdpi.com/2076-0787/5/1/12/pdf |
