| article html file updated | 7 February 2020 03:46 CET | Update | https://www.mdpi.com/2218-6581/5/1/3 |
| article html file updated | 6 May 2019 01:55 CEST | Update | - |
| article html file updated | 26 March 2019 19:08 CET | Update | - |
| article html file updated | 16 June 2016 05:50 CEST | Original file | - |
| article pdf uploaded. | 22 January 2016 12:23 CET | Version of Record | https://www.mdpi.com/2218-6581/5/1/3/pdf |
| article xml uploaded. | 22 January 2016 12:23 CET | Original file | https://www.mdpi.com/2218-6581/5/1/3/xml |
