| article html file updated | 7 February 2020 04:07 CET | Update | https://www.mdpi.com/2220-9964/5/2/8 |
| article html file updated | 6 May 2019 01:16 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:48 CET | Original file | N/A |
| article pdf uploaded. | 1 February 2016 09:07 CET | Version of Record | https://www.mdpi.com/2220-9964/5/2/8/pdf |
| article xml uploaded. | 1 February 2016 09:07 CET | Original file | https://www.mdpi.com/2220-9964/5/2/8/xml |
