| article html file updated | 8 February 2020 03:31 CET | Update | https://www.mdpi.com/2073-4360/9/4/139 |
| article html file updated | 24 September 2019 07:19 CEST | Update | - |
| article html file updated | 4 May 2019 02:21 CEST | Update | - |
| article html file updated | 18 March 2019 05:35 CET | Update | - |
| article html file updated | 28 April 2017 10:38 CEST | Update | - |
| article html file updated | 14 April 2017 09:19 CEST | Original file | - |
| article xml uploaded. | 14 April 2017 09:18 CEST | Original file | https://www.mdpi.com/2073-4360/9/4/139/xml |
| article pdf uploaded. | 14 April 2017 09:18 CEST | Updated version of record | https://www.mdpi.com/2073-4360/9/4/139/pdf |
| article pdf uploaded. | 13 April 2017 15:46 CEST | Version of Record | https://www.mdpi.com/2073-4360/9/4/139/pdf-vor |
