| article html file updated | 6 February 2020 09:52 CET | Update | https://www.mdpi.com/2079-9268/4/2/138 |
| article html file updated | 7 May 2019 13:18 CEST | Update | N/A |
| article html file updated | 21 March 2019 18:36 CET | Update | N/A |
| article html file updated | 28 December 2015 09:42 CET | Original file | N/A |
| article xml file uploaded | 28 December 2015 09:42 CET | Original file | https://www.mdpi.com/2079-9268/4/2/138/xml |
| article pdf uploaded. | 13 June 2014 08:51 CEST | Updated version of record | https://www.mdpi.com/2079-9268/4/2/138/pdf |
| article pdf uploaded. | 12 June 2014 15:47 CEST | Updated version of record | https://www.mdpi.com/2079-9268/4/2/138/pdf-vor |
| article pdf uploaded. | 11 June 2014 14:46 CEST | Version of Record | https://www.mdpi.com/2079-9268/4/2/138/pdf-vor |
