| article html file updated | 7 February 2020 07:51 CET | Update | https://www.mdpi.com/2073-431X/5/2/6 |
| article html file updated | 5 May 2019 17:26 CEST | Update | N/A |
| article html file updated | 27 March 2019 03:07 CET | Update | N/A |
| article html file updated | 28 June 2016 09:07 CEST | Update | N/A |
| article html file updated | 27 April 2016 11:53 CEST | Original file | N/A |
| article xml uploaded. | 27 April 2016 11:52 CEST | Original file | https://www.mdpi.com/2073-431X/5/2/6/xml |
| article pdf uploaded. | 27 April 2016 11:52 CEST | Version of Record | https://www.mdpi.com/2073-431X/5/2/6/pdf |
