| article html file updated | 7 February 2020 05:03 CET | Update | https://www.mdpi.com/2227-9709/3/1/2 |
| article html file updated | 5 May 2019 23:13 CEST | Update | N/A |
| article html file updated | 26 March 2019 21:46 CET | Update | N/A |
| article html file updated | 27 October 2017 10:21 CEST | Original file | N/A |
| article pdf uploaded. | 26 February 2016 14:32 CET | Version of Record | https://www.mdpi.com/2227-9709/3/1/2/pdf |
| article xml uploaded. | 26 February 2016 14:32 CET | Original file | https://www.mdpi.com/2227-9709/3/1/2/xml |
