It seems as if Zechariah 6:9-15 forms a distinct section in the structure of the book. Kline addresses the question of the precise role of this passage in the structure of the book and this takes him to make a proposal on the overall structure of Zechariah.
Looking at Zechariah 9:9, this article shows how Zechariah pointed to Christ as the promised, righteous, victorious, and humble King.
Applying Zechariah 10:4 to Christ, this article shows how the names in this text apply to Christ revealing who he is.
This article on Zechariah 2:1-5 is about our expectation of God and the purpose of God.
Working from Zechariah 4:6-10, this article shows how the Israelites, upon returning to Jerusalem after exile, faced an impossible task of rebuilding the city and the temple. God strengthened the Israelites by showing that He will be the one accomplishing the task through Zerubbabel. Similarly, the church today can trust that the work of mankind's restoration will be accomplished by Christ.
This article analyzes the book of Zechariah with respect to its literary unity. Continuity between the two major sections of the book is reflected upon. Next, major themes are traced to determine their development and/or modification.