| article html file updated | 8 February 2020 04:24 CET | Update | https://www.mdpi.com/2079-9268/7/2/8 |
| article html file updated | 24 September 2019 12:23 CEST | Update | N/A |
| article html file updated | 4 May 2019 00:42 CEST | Update | N/A |
| article html file updated | 8 June 2017 11:05 CEST | Update | N/A |
| article xml uploaded. | 8 June 2017 11:04 CEST | Update | https://www.mdpi.com/2079-9268/7/2/8/xml |
| article pdf uploaded. | 8 June 2017 11:04 CEST | Updated version of record | https://www.mdpi.com/2079-9268/7/2/8/pdf |
| article html file updated | 26 April 2017 16:09 CEST | Original file | N/A |
| article pdf uploaded. | 26 April 2017 16:07 CEST | Version of Record | https://www.mdpi.com/2079-9268/7/2/8/pdf-vor |
