| article html file updated | 8 February 2020 08:23 CET | Update | https://www.mdpi.com/2075-4701/7/6/221 |
| article html file updated | 25 September 2019 09:01 CEST | Update | - |
| article html file updated | 3 May 2019 17:16 CEST | Update | - |
| article html file updated | 28 June 2017 14:04 CEST | Update | - |
| article html file updated | 15 June 2017 13:54 CEST | Original file | - |
| article xml uploaded. | 15 June 2017 13:52 CEST | Original file | https://www.mdpi.com/2075-4701/7/6/221/xml |
| article pdf uploaded. | 15 June 2017 13:52 CEST | Version of Record | https://www.mdpi.com/2075-4701/7/6/221/pdf |
