National Transportation Safety Board (NTSB): Aviation Investigation Final Report

Anchorage Daily News: NTSB: Pilot error and inadequate training were probable cause of Alaska heli-ski crash that killed 5 including Czech billionaire – September 27, 2023

Outside Magazine: What We Know About the Deadly Alaskan Heli Crash – April 10, 2021

Valley News obituary: Sean Michael McManamy– April 4, 2021

KTUU – Alaska’s News Source: Helicopter crash victims included highly experienced mountain guides – March 30, 2021

Valley News coverage: Hanover High graduate killed in Alaskan helicopter crash – March 29, 2021

Anchorage Daily News coverage: NTSB: Helicopter crash that killed 5 occurred near top of high ridge above Knik Glacier – March 29, 2021

NYT coverage: Czech Billionaire Is Among 5 Killed in Heli-Skiing Crash Near Alaska Glacier – March 29, 2021