| article html file updated | 7 February 2020 04:22 CET | Update | https://www.mdpi.com/1424-8247/9/1/8 |
| article html file updated | 6 May 2019 00:47 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:18 CET | Update | N/A |
| article html file updated | 27 October 2017 10:46 CEST | Update | N/A |
| article html file updated | 30 March 2016 12:07 CEST | Original file | N/A |
| article pdf uploaded. | 6 February 2016 02:53 CET | Version of Record | https://www.mdpi.com/1424-8247/9/1/8/pdf |
| article xml uploaded. | 6 February 2016 02:53 CET | Original file | https://www.mdpi.com/1424-8247/9/1/8/xml |
