| article html file updated | 7 February 2020 04:00 CET | Update | https://www.mdpi.com/2305-6320/3/1/4 |
| article html file updated | 6 May 2019 01:29 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:35 CET | Original file | N/A |
| article pdf uploaded. | 29 January 2016 15:30 CET | Updated version of record | https://www.mdpi.com/2305-6320/3/1/4/pdf |
| article xml uploaded. | 28 January 2016 11:22 CET | Original file | https://www.mdpi.com/2305-6320/3/1/4/xml |
| article pdf uploaded. | 28 January 2016 11:22 CET | Version of Record | https://www.mdpi.com/2305-6320/3/1/4/pdf-vor |
