| article html file updated | 8 February 2020 16:37 CET | Update | https://www.mdpi.com/2079-9292/6/3/68 |
| article html file updated | 27 September 2019 05:55 CEST | Update | - |
| article html file updated | 3 May 2019 01:10 CEST | Update | - |
| article html file updated | 30 September 2017 07:52 CEST | Update | - |
| article html file updated | 21 September 2017 11:33 CEST | Original file | - |
| article xml uploaded. | 21 September 2017 11:31 CEST | Original file | https://www.mdpi.com/2079-9292/6/3/68/xml |
| article pdf uploaded. | 21 September 2017 11:31 CEST | Updated version of record | https://www.mdpi.com/2079-9292/6/3/68/pdf |
| article pdf uploaded. | 19 September 2017 15:04 CEST | Version of Record | https://www.mdpi.com/2079-9292/6/3/68/pdf-vor |
