| article html file updated | 7 February 2020 04:16 CET | Update | https://www.mdpi.com/2297-8739/3/1/4 |
| article html file updated | 6 May 2019 00:59 CEST | Update | - |
| article html file updated | 26 March 2019 20:06 CET | Update | - |
| article html file updated | 19 April 2016 11:55 CEST | Original file | - |
| article pdf uploaded. | 22 March 2016 13:47 CET | Updated version of record | https://www.mdpi.com/2297-8739/3/1/4/pdf |
| article pdf uploaded. | 4 February 2016 09:21 CET | Version of Record | https://www.mdpi.com/2297-8739/3/1/4/pdf-vor |
| article xml uploaded. | 4 February 2016 09:21 CET | Original file | https://www.mdpi.com/2297-8739/3/1/4/xml |
