Sub-irrigated planter FAQ Archived 2008-09-13 at the Wayback Machine, from Planter Technology http://www.plantertechnology.com/train/faq_cont.html
How To Make a Two Bucket Sub-Irrigated Planter http://greenroofgrowers.blogspot.com/2008/07/how-make-two-bucket-sub-irrigated.html
[https://albopepper.com/30-gallon-tote.php Creating a Sub-irrigated
Tote Garden Planter] https://albopepper.com/30-gallon-tote.php
Csizinszky, A.A. (1998). "The Potential For The Sequential Production Of Vegetables In The Field With The 'Earth Box' System". Acta Hortic. 513: 137–144. doi:10.17660/ActaHortic.1998.513.16. Retrieved 2016-12-01. http://www.actahort.org/books/513/513_16.htm