| article html file updated | 6 February 2020 00:54 CET | Update | https://www.mdpi.com/2220-9964/2/1/135 |
| article html file updated | 8 May 2019 07:35 CEST | Update | N/A |
| article html file updated | 20 March 2019 19:31 CET | Update | N/A |
| article html file updated | 17 June 2015 07:21 CEST | Update | N/A |
| article html file updated | 14 August 2014 12:05 CEST | Original file | N/A |
| article xml file uploaded | 14 August 2014 12:05 CEST | Original file | https://www.mdpi.com/2220-9964/2/1/135/xml |
| article pdf uploaded. | 8 March 2013 13:35 CET | Version of Record | https://www.mdpi.com/2220-9964/2/1/135/pdf |
