| article html file updated | 7 February 2020 04:26 CET | Update | https://www.mdpi.com/2220-9964/5/2/12 |
| article html file updated | 6 May 2019 00:39 CEST | Update | - |
| article html file updated | 26 March 2019 20:27 CET | Original file | - |
| article pdf uploaded. | 6 February 2016 10:50 CET | Version of Record | https://www.mdpi.com/2220-9964/5/2/12/pdf |
| article xml uploaded. | 6 February 2016 10:50 CET | Original file | https://www.mdpi.com/2220-9964/5/2/12/xml |
