| article html file updated | 8 February 2020 02:40 CET | Update | https://www.mdpi.com/2077-0472/7/4/33 |
| article html file updated | 24 September 2019 02:36 CEST | Update | - |
| article html file updated | 4 May 2019 04:08 CEST | Update | - |
| article html file updated | 27 April 2017 05:47 CEST | Update | - |
| article html file updated | 31 March 2017 16:03 CEST | Original file | - |
| article xml uploaded. | 31 March 2017 16:02 CEST | Original file | https://www.mdpi.com/2077-0472/7/4/33/xml |
| article pdf uploaded. | 31 March 2017 16:02 CEST | Version of Record | https://www.mdpi.com/2077-0472/7/4/33/pdf |
