| article html file updated | 8 February 2020 03:28 CET | Update | https://www.mdpi.com/2073-4352/7/4/109 |
| article html file updated | 4 May 2019 02:26 CEST | Update | - |
| article html file updated | 28 April 2017 05:49 CEST | Update | - |
| article html file updated | 14 April 2017 11:58 CEST | Original file | - |
| article xml uploaded. | 14 April 2017 11:56 CEST | Original file | https://www.mdpi.com/2073-4352/7/4/109/xml |
| article pdf uploaded. | 14 April 2017 11:56 CEST | Updated version of record | https://www.mdpi.com/2073-4352/7/4/109/pdf |
| article pdf uploaded. | 12 April 2017 13:09 CEST | Version of Record | https://www.mdpi.com/2073-4352/7/4/109/pdf-vor |
