| article html file updated | 7 February 2020 04:43 CET | Update | https://www.mdpi.com/2220-9964/5/2/19 |
| article html file updated | 5 May 2019 23:57 CEST | Update | - |
| article html file updated | 26 March 2019 21:04 CET | Original file | - |
| article pdf uploaded. | 19 February 2016 04:24 CET | Version of Record | https://www.mdpi.com/2220-9964/5/2/19/pdf |
| article xml uploaded. | 19 February 2016 04:24 CET | Original file | https://www.mdpi.com/2220-9964/5/2/19/xml |
