| article html file updated | 8 February 2020 07:37 CET | Update | https://www.mdpi.com/1999-4915/9/6/138 |
| article html file updated | 25 September 2019 05:01 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:42 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:04 CEST | Update | N/A |
| article html file updated | 6 June 2017 14:09 CEST | Original file | N/A |
| article xml uploaded. | 6 June 2017 14:08 CEST | Original file | https://www.mdpi.com/1999-4915/9/6/138/xml |
| article pdf uploaded. | 6 June 2017 14:08 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/6/138/pdf |
