diff --git a/.gitignore b/.gitignore
index a6c57f5..ec51a17 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.json
+*.swp
diff --git a/README.md b/README.md
index a98f906..7eb5aac 100644
--- a/README.md
+++ b/README.md
@@ -51,9 +51,17 @@ func main() {
 ## API Reference
 
 ### FetchPapers(startDate, endDate, query string, maxResults int) ([]Paper, error)
+startDate: Start date in format "YYYYMMDD"
+endDate: End date in format "YYYYMMDD"
+query: Search query
+maxResults: Maximum number of results (1-2000)
 Fetches papers from arXiv API
 
 ### SaveToFile(papers []Paper, startDate, endDate, query string) error
+papers: Array of Paper structs
+startDate: Start date in format "YYYYMMDD"
+endDate: End date in format "YYYYMMDD"
+query: Search query
 Saves papers to a JSON file
 
 ## Dependencies