| article html file updated | 6 February 2020 16:16 CET | Update | https://www.mdpi.com/2227-9717/3/1/138 |
| article html file updated | 7 May 2019 00:23 CEST | Update | N/A |
| article html file updated | 25 March 2019 22:21 CET | Update | N/A |
| article html file updated | 21 August 2015 08:11 CEST | Update | N/A |
| article html file updated | 20 July 2015 12:39 CEST | Original file | N/A |
| article xml file uploaded | 20 July 2015 12:39 CEST | Original file | https://www.mdpi.com/2227-9717/3/1/138/xml |
| article pdf uploaded. | 4 March 2015 08:57 CET | Updated version of record | https://www.mdpi.com/2227-9717/3/1/138/pdf |
| article pdf uploaded. | 3 March 2015 13:16 CET | Version of Record | https://www.mdpi.com/2227-9717/3/1/138/pdf-vor |
