| article html file updated | 8 February 2020 22:38 CET | Update | https://www.mdpi.com/2076-0817/6/4/61 |
| article html file updated | 28 September 2019 20:38 CEST | Update | N/A |
| article html file updated | 2 May 2019 11:47 CEST | Update | N/A |
| article html file updated | 18 April 2019 09:24 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:17 CET | Update | N/A |
| article html file updated | 4 December 2017 08:58 CET | Update | N/A |
| article xml uploaded. | 4 December 2017 08:57 CET | Update | https://www.mdpi.com/2076-0817/6/4/61/xml |
| article pdf uploaded. | 4 December 2017 08:57 CET | Updated version of record | https://www.mdpi.com/2076-0817/6/4/61/pdf |
| article html file updated | 30 November 2017 14:31 CET | Original file | N/A |
| article xml uploaded. | 30 November 2017 10:18 CET | Original file | N/A |
| article pdf uploaded. | 30 November 2017 10:18 CET | Version of Record | https://www.mdpi.com/2076-0817/6/4/61/pdf-vor |
