| article html file updated | 8 February 2020 03:04 CET | Update | https://www.mdpi.com/1996-1073/10/4/501 |
| article html file updated | 24 September 2019 04:54 CEST | Update | - |
| article html file updated | 4 May 2019 03:14 CEST | Update | - |
| article html file updated | 28 April 2017 06:11 CEST | Update | - |
| article html file updated | 10 April 2017 08:38 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 08:36 CEST | Original file | https://www.mdpi.com/1996-1073/10/4/501/xml |
| article pdf uploaded. | 10 April 2017 08:36 CEST | Updated version of record | https://www.mdpi.com/1996-1073/10/4/501/pdf |
| article pdf uploaded. | 7 April 2017 09:55 CEST | Version of Record | https://www.mdpi.com/1996-1073/10/4/501/pdf-vor |
