https://sustainablescientist.net/2010/09/04/potatoes-by-olla-or-not-here-is-the-answer/
https://kobra.bibliothek.uni-kassel.de/bitstream/urn:nbn:de:hebis:34-2011101139325/1/JARTSVol112No1S11.pdf
http://permaculturenews.org/2010/09/16/ollas-unglazed-clay-pots-for-garden-irrigation/
https://www.youtube.com/watch?v=qkNxACJ9vPI
www.sciencedirect.com/science/article/abs/pii/S0304423822008226?fbclid=IwAR1iHlWsBFyoivYVkZlbC_UrXZ-W4GDUQPzhr5jNjjydKF8Qk4NvaBIFM3Q
www.sciencedirect.com/science/article/abs/pii/S0378377421002377?fbclid=IwAR1iHlWsBFyoivYVkZlbC_UrXZ-W4GDUQPzhr5jNjjydKF8Qk4NvaBIFM3Q
www.sciencedirect.com/science/article/abs/pii/S2589014X21000037?fbclid=IwAR3SOT9h8Y5QdXaFx3BIhU5l2uOvvPO6qB-MS2veLz_SiYBhGNLu3H11dtA
www.sciencedirect.com/science/article/abs/pii/S0378377400001190?fbclid=IwAR3UVRT-kEHhuXp31DSO79DvAF8UiX1NyVXkFHsEo-wgXEqob36HjlShwk8
https://kobra.bibliothek.uni-kassel.de/bitstream/urn:nbn:de:hebis:34-2011101139325/1/JARTSVol112No1S11.pdf
http://permaculturenews.org/2010/09/16/ollas-unglazed-clay-pots-for-garden-irrigation/
https://www.youtube.com/watch?v=qkNxACJ9vPI
www.sciencedirect.com/science/article/abs/pii/S0304423822008226?fbclid=IwAR1iHlWsBFyoivYVkZlbC_UrXZ-W4GDUQPzhr5jNjjydKF8Qk4NvaBIFM3Q
www.sciencedirect.com/science/article/abs/pii/S0378377421002377?fbclid=IwAR1iHlWsBFyoivYVkZlbC_UrXZ-W4GDUQPzhr5jNjjydKF8Qk4NvaBIFM3Q
www.sciencedirect.com/science/article/abs/pii/S2589014X21000037?fbclid=IwAR3SOT9h8Y5QdXaFx3BIhU5l2uOvvPO6qB-MS2veLz_SiYBhGNLu3H11dtA
www.sciencedirect.com/science/article/abs/pii/S0378377400001190?fbclid=IwAR3UVRT-kEHhuXp31DSO79DvAF8UiX1NyVXkFHsEo-wgXEqob36HjlShwk8