| article html file updated | 7 February 2020 04:09 CET | Update | https://www.mdpi.com/2075-4701/6/2/32 |
| article html file updated | 6 May 2019 01:13 CEST | Update | - |
| article html file updated | 26 March 2019 19:51 CET | Original file | - |
| article pdf uploaded. | 2 February 2016 08:26 CET | Version of Record | https://www.mdpi.com/2075-4701/6/2/32/pdf |
| article xml uploaded. | 2 February 2016 08:26 CET | Original file | https://www.mdpi.com/2075-4701/6/2/32/xml |
