| article html file updated | 7 February 2020 10:07 CET | Update | https://www.mdpi.com/2220-9964/5/6/90 |
| article html file updated | 5 May 2019 13:03 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:23 CET | Update | N/A |
| article html file updated | 29 June 2016 05:46 CEST | Update | N/A |
| article html file updated | 14 June 2016 22:46 CEST | Original file | N/A |
| article xml uploaded. | 14 June 2016 10:00 CEST | Original file | https://www.mdpi.com/2220-9964/5/6/90/xml |
| article pdf uploaded. | 14 June 2016 10:00 CEST | Version of Record | https://www.mdpi.com/2220-9964/5/6/90/pdf |
