| article html file updated | 8 February 2020 15:41 CET | Update | https://www.mdpi.com/2076-0787/6/3/72 |
| article html file updated | 3 May 2019 02:53 CEST | Update | N/A |
| article html file updated | 8 September 2017 12:48 CEST | Original file | N/A |
| article xml uploaded. | 8 September 2017 12:47 CEST | Original file | https://www.mdpi.com/2076-0787/6/3/72/xml |
| article pdf uploaded. | 8 September 2017 12:47 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/3/72/pdf |
