| article html file updated | 8 February 2020 08:03 CET | Update | https://www.mdpi.com/2079-9276/6/2/21 |
| article html file updated | 25 September 2019 07:12 CEST | Update | N/A |
| article html file updated | 3 May 2019 17:53 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:23 CEST | Update | N/A |
| article html file updated | 14 June 2017 08:33 CEST | Original file | N/A |
| article xml uploaded. | 14 June 2017 08:32 CEST | Original file | https://www.mdpi.com/2079-9276/6/2/21/xml |
| article pdf uploaded. | 14 June 2017 08:32 CEST | Updated version of record | https://www.mdpi.com/2079-9276/6/2/21/pdf |
| article pdf uploaded. | 12 June 2017 10:50 CEST | Version of Record | https://www.mdpi.com/2079-9276/6/2/21/pdf-vor |
