| article html file updated | 8 February 2020 03:34 CET | Update | https://www.mdpi.com/2076-3921/6/2/30 |
| article html file updated | 24 September 2019 07:38 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:15 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:29 CEST | Update | N/A |
| article html file updated | 14 April 2017 06:27 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2017 06:26 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/30/xml |
| article pdf uploaded. | 14 April 2017 06:26 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/30/pdf |
