Your research topic may differ slightly, but the methods here may help you find peer-reviewed articles.
Search the Library
There are many ways to go about it. I started with the easiest method first: on the library website I clicked on Articles and then searched for the terms "outdoor education and children with disabilities". Unfortunately, most of the resulting articles did not get to the heart of your question. These look like they might be relevant though:
- Inclusion through access to outdoor education: Learning in Motion
- Integrating outdoor/environmental education into the special education curriculum
- Going Outside Together: Good Practice with Respect to the Inclusion of Disabled Children in Primary School Playgrounds
Search Databases
I then went back to the library site, clicked on "Select a subject" and went to "Special Education".
I opened the top database listed: Academic Search Premier. Before searching I clicked "Choose Databases", checked the box for ERIC, and clicked OK. I then searched for "Outdoor education" AND "Children with disab*" (see screenshot)
One tantalizing article, called Qualitative Outcomes for Youth Who Participate in Inclusive Programs: A Multi-Case Analysis across 14 Camps and Outdoor Schools, is not available in full text. However, you can request it via interlibrary loan with this link. (There's a short questionnaire if you haven't ever used interlibrary loan before.) Once you submit the request, the article should be emailed to you within a couple of days.
Likewise, an article titled Celebrating the Camp Experience through Eighty Years of Camp Research was not available in full text. Here is the link to request it via interlibrary loan.
This article, Integrating children with severe disabilities for intensified outdoor education, was not in full text, but I found this copy through Google Scholar.