| article html file updated | 8 February 2020 10:46 CET | Update | https://www.mdpi.com/2304-8158/6/7/50 |
| article html file updated | 25 September 2019 21:28 CEST | Update | - |
| article html file updated | 3 May 2019 12:49 CEST | Update | - |
| article html file updated | 28 July 2017 11:34 CEST | Update | - |
| article html file updated | 12 July 2017 09:57 CEST | Original file | - |
| article xml uploaded. | 12 July 2017 09:55 CEST | Original file | https://www.mdpi.com/2304-8158/6/7/50/xml |
| article pdf uploaded. | 12 July 2017 09:55 CEST | Version of Record | https://www.mdpi.com/2304-8158/6/7/50/pdf |
