| article html file updated | 7 February 2020 15:37 CET | Update | https://www.mdpi.com/2076-0787/5/4/81 |
| article html file updated | 5 May 2019 02:58 CEST | Update | N/A |
| article html file updated | 27 September 2016 12:55 CEST | Original file | N/A |
| article xml uploaded. | 27 September 2016 12:54 CEST | Original file | https://www.mdpi.com/2076-0787/5/4/81/xml |
| article pdf uploaded. | 27 September 2016 12:54 CEST | Version of Record | https://www.mdpi.com/2076-0787/5/4/81/pdf |
