M. Hummel
Hummel, M., and Stuart E. G. Findlay. 2006. “Effects Of Water Chestnut (Trapa Natans) Beds On Water Chemistry In The Tidal Freshwater Hudson River”. Hydrobiologia 559: 169-181.
Hummel, M. 2004. “Ecological Studies Of Water Chestnut (Trapa Natans)”. Annandale-On-Hudson, New York, Bard College.