| article html file updated | 9 February 2020 00:06 CET | Update | https://www.mdpi.com/2075-471X/6/4/30 |
| article html file updated | 2 May 2019 08:31 CEST | Update | - |
| article html file updated | 18 April 2019 06:17 CEST | Update | - |
| article html file updated | 18 December 2017 06:58 CET | Update | - |
| article xml uploaded. | 18 December 2017 06:56 CET | Update | https://www.mdpi.com/2075-471X/6/4/30/xml |
| article pdf uploaded. | 18 December 2017 06:56 CET | Updated version of record | https://www.mdpi.com/2075-471X/6/4/30/pdf |
| article html file updated | 14 December 2017 14:32 CET | Original file | - |
| article xml uploaded. | 14 December 2017 14:31 CET | Original file | - |
| article pdf uploaded. | 14 December 2017 14:31 CET | Version of Record | https://www.mdpi.com/2075-471X/6/4/30/pdf-vor |
