| article html file updated | 6 February 2020 17:58 CET | Update | https://www.mdpi.com/2077-0375/5/2/168 |
| article html file updated | 6 May 2019 21:21 CEST | Update | N/A |
| article html file updated | 26 March 2019 01:14 CET | Update | N/A |
| article html file updated | 8 September 2015 06:05 CEST | Update | N/A |
| article xml file uploaded | 8 September 2015 06:05 CEST | Update | https://www.mdpi.com/2077-0375/5/2/168/xml |
| article html file updated | 21 August 2015 11:02 CEST | Update | N/A |
| article html file updated | 9 July 2015 06:46 CEST | Original file | N/A |
| article xml file uploaded | 9 July 2015 06:46 CEST | Original file | N/A |
| article pdf uploaded. | 23 April 2015 11:09 CEST | Version of Record | https://www.mdpi.com/2077-0375/5/2/168/pdf |
