| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Atypon | https://array.aami.org/doi/10.2345/i0899-8205-40-6-483.1 | |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=17190091.ui | |
| subscription/membership/fee required | Silverchair Information Systems | https://meridian.allenpress.com/bit/article-lookup/doi/10.2345/i0899-8205-40-6-483.1 |