| article html file updated | 7 February 2020 02:12 CET | Update | https://www.mdpi.com/2226-4787/3/4/372 |
| article html file updated | 6 May 2019 05:03 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:24 CET | Original file | N/A |
| article pdf uploaded. | 14 December 2015 11:44 CET | Version of Record | https://www.mdpi.com/2226-4787/3/4/372/pdf |
| article xml uploaded. | 14 December 2015 11:44 CET | Original file | https://www.mdpi.com/2226-4787/3/4/372/xml |
