Recursion and stack
Finite and Infinite Recursion with examples - GeeksforGeeks
Thinking Recursively in Python – Real Python
Find Minimum Depth of a Binary Tree - GeeksforGeeks
Recursion (computer science) - Wikipedia
Recursion Tree Method
How to solve time complexity Recurrence Relations using Recursion Tree method? - GeeksforGeeks
Recursion Tree Method to Solve Recurrences
Recursion in Python: An Introduction – Real Python
Chapter 4 - Backtracking and Tree Traversal Algorithms
Searching a binary tree - Algorithm (recursive)
Recursion Tree and DAG (Dynamic Programming/DP) - VisuAlgo
Chapter 4 - Backtracking and Tree Traversal Algorithms