| article html file updated | 6 February 2020 07:39 CET | Update | https://www.mdpi.com/2227-7072/2/1/122 |
| article html file updated | 7 May 2019 17:51 CEST | Update | N/A |
| article html file updated | 21 March 2019 13:16 CET | Update | N/A |
| article html file updated | 19 August 2015 22:18 CEST | Update | N/A |
| article html file updated | 24 June 2014 12:11 CEST | Original file | N/A |
| article xml file uploaded | 24 June 2014 12:11 CEST | Original file | https://www.mdpi.com/2227-7072/2/1/122/xml |
| article pdf uploaded. | 25 March 2014 08:53 CET | Updated version of record | https://www.mdpi.com/2227-7072/2/1/122/pdf |
| article pdf uploaded. | 3 March 2014 15:02 CET | Version of Record | https://www.mdpi.com/2227-7072/2/1/122/pdf-vor |
