| article html file updated | 8 February 2020 05:31 CET | Update | https://www.mdpi.com/2223-7747/6/2/18 |
| article html file updated | 24 September 2019 18:06 CEST | Update | - |
| article html file updated | 3 May 2019 22:41 CEST | Update | - |
| article html file updated | 29 June 2017 12:46 CEST | Update | - |
| article html file updated | 8 June 2017 08:52 CEST | Update | - |
| article xml uploaded. | 8 June 2017 08:51 CEST | Update | https://www.mdpi.com/2223-7747/6/2/18/xml |
| article pdf uploaded. | 8 June 2017 08:51 CEST | Updated version of record | https://www.mdpi.com/2223-7747/6/2/18/pdf |
| article html file updated | 23 May 2017 03:59 CEST | Update | - |
| article html file updated | 10 May 2017 12:04 CEST | Original file | - |
| article pdf uploaded. | 10 May 2017 12:03 CEST | Version of Record | https://www.mdpi.com/2223-7747/6/2/18/pdf-vor |
