| article html file updated | 8 February 2020 20:52 CET | Update | https://www.mdpi.com/2079-9276/6/4/64 |
| article html file updated | 28 September 2019 09:22 CEST | Update | N/A |
| article html file updated | 2 May 2019 15:43 CEST | Update | N/A |
| article html file updated | 2 January 2018 10:27 CET | Update | N/A |
| article html file updated | 13 November 2017 10:16 CET | Original file | N/A |
| article xml uploaded. | 13 November 2017 10:14 CET | Original file | https://www.mdpi.com/2079-9276/6/4/64/xml |
| article pdf uploaded. | 13 November 2017 10:14 CET | Updated version of record | https://www.mdpi.com/2079-9276/6/4/64/pdf |
| article pdf uploaded. | 10 November 2017 11:42 CET | Version of Record | https://www.mdpi.com/2079-9276/6/4/64/pdf-vor |
