Fix broken links

docs/apis/graph-api/graph-api.md

@@ -23,9 +23,9 @@ Please note that the Graph API:
 
 Please use the following links to learn more about the Graph API:
 
-- [Getting a single entity](./getting-a-single-entity) - Retrieve detailed information on a single entity.
+- [Getting a single entity](./getting-a-single-entity.md) - Retrieve detailed information on a single entity.
-- [Searching entities](./searching-entities/overview) - Retrieve a list of entities based on specific search criteria.
+- [Searching entities](./searching-entities/searching-entities.md) - Retrieve a list of entities based on specific search criteria.
-    - [Filtering results](./searching-entities/filtering-search-results) - Filter search results based on specific criteria.
+    - [Filtering results](./searching-entities/filtering-search-results.md) - Filter search results based on specific criteria.
-    - [Sorting results](./searching-entities/sorting-and-paging#sorting) - Sort search results based on specific criteria.
+    - [Sorting results](./searching-entities/sorting-and-paging.md#sorting) - Sort search results based on specific criteria.
-    - [Paging](./searching-entities/sorting-and-paging#paging) - Retrieve a subset of search results. 
+    - [Paging](./searching-entities/sorting-and-paging.md#paging) - Retrieve a subset of search results. 
-- [Making requests](./making-requests) - Learn how to make requests with different programming languages.
+- [Making requests](./making-requests.md) - Learn how to make requests with different programming languages.

docs/apis/graph-api/searching-entities/filtering-search-results.md

@@ -1,7 +1,7 @@
 # Filtering search results
 
 Filters can be used to narrow down the search results based on specific criteria. 
-Filters are provided as query parameters in the request URL (see [here](./overview#endpoints) for the available search entpoints). 
+Filters are provided as query parameters in the request URL (see [here](./searching-entities.md) for the available search entpoints). 
 
 Multiple filters can be provided in a single request; they should be formatted as follows:
 `param1=value1&param2=value2&...&paramN=valueN`.

docs/apis/home.md

@@ -1,7 +1,7 @@
 # Public APIs
 
 The OpenAIRE Graph data are accessible through various public APIs. More specifically, the following APIs are currently provided:
-* [Graph API](./graph-api/overview) - an API to explore the OpenAIRE Graph
+* [Graph API](./graph-api/graph-api.md) - an API to explore the OpenAIRE Graph
 * [Search API](./search-api/search-api.md) - an API to search for research products and projects
 * [ScholeXplorer API](https://api.scholexplorer.openaire.eu/swagger-ui/index.html?urls.primaryName=Scholexplorer%20API%20V2.0) - an API offering dataset-publication & dataset-dataset links
 * [DSpace & EPrints API](./dspace-eprints-api.md) - an API to offer custom access to metadata for projects funded by a selection of international funders for DSpace and EPrints platforms

sidebars.js

@@ -61,13 +61,13 @@ const sidebars = {
         {
           type: 'category', 
           label: "Graph API",
-          link: { type: 'doc', id: 'apis/graph-api/overview' },
+          link: { type: 'doc', id: 'apis/graph-api/graph-api' },
           items: [
             { type: 'doc', id: 'apis/graph-api/getting-a-single-entity' },
             {
               type: 'category',
                 label: "Searching entities",
-                link: { type: 'doc', id: 'apis/graph-api/searching-entities/overview' },
+                link: { type: 'doc', id: 'apis/graph-api/searching-entities/searching-entities' },
                 items: [
                   { type: 'doc', id: 'apis/graph-api/searching-entities/filtering-search-results' },
                   { type: 'doc', id: 'apis/graph-api/searching-entities/sorting-and-paging' },