Farooq, Rashid, Abdul Razzaq Ghumman, Muhammad Atiq Ur Rehman Tariq, Afzal Ahmed, and Khan Zaib Jadoon. 2020. “Optimal Octagonal Hooked Collar Countermeasure to Reduce Scour Around a Single Bridge Pier”. Periodica Polytechnica Civil Engineering 64 (4):1026-37. https://doi.org/10.3311/PPci.15966.