| article html file updated | 7 February 2020 02:33 CET | Update | https://www.mdpi.com/2075-4418/6/1/1 |
| article html file updated | 6 May 2019 04:20 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:59 CET | Update | N/A |
| article html file updated | 28 March 2016 11:27 CEST | Original file | N/A |
| article pdf uploaded. | 24 December 2015 08:49 CET | Updated version of record | https://www.mdpi.com/2075-4418/6/1/1/pdf |
| article pdf uploaded. | 22 December 2015 16:15 CET | Version of Record | https://www.mdpi.com/2075-4418/6/1/1/pdf-vor |
