| article html file updated | 8 February 2020 03:36 CET | Update | https://www.mdpi.com/2075-4701/7/4/139 |
| article html file updated | 24 September 2019 07:48 CEST | Update | - |
| article html file updated | 4 May 2019 02:11 CEST | Update | - |
| article html file updated | 28 April 2017 06:59 CEST | Update | - |
| article html file updated | 14 April 2017 13:31 CEST | Original file | - |
| article xml uploaded. | 14 April 2017 13:29 CEST | Original file | https://www.mdpi.com/2075-4701/7/4/139/xml |
| article pdf uploaded. | 14 April 2017 13:29 CEST | Version of Record | https://www.mdpi.com/2075-4701/7/4/139/pdf |
