| article html file updated | 8 February 2020 07:35 CET | Update | https://www.mdpi.com/1999-4915/9/6/139 |
| article html file updated | 25 September 2019 04:51 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:46 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:04 CEST | Update | N/A |
| article html file updated | 7 June 2017 12:19 CEST | Original file | N/A |
| article xml uploaded. | 7 June 2017 12:18 CEST | Original file | https://www.mdpi.com/1999-4915/9/6/139/xml |
| article pdf uploaded. | 7 June 2017 12:18 CEST | Updated version of record | https://www.mdpi.com/1999-4915/9/6/139/pdf |
| article pdf uploaded. | 6 June 2017 12:43 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/6/139/pdf-vor |
