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Nowak EJ, Martin CE (1997). "Physiological and anatomical responses to water deficits in the CAM epiphyte Tillandsia ionantha (Bromeliaceae)". International Journal of Plant Sciences. 158 (6): 818–826. Bibcode:1997IJPlS.158..818N. doi:10.1086/297495. hdl:1808/9858. JSTOR2475361.
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Hillier R, Edwards D, Morrissey LB (2008). "Sedimentological evidence for rooting structures in the Early Devonian Anglo–Welsh Basin (UK), with speculation on their producers". Palaeogeography, Palaeoclimatology, Palaeoecology. 270 (3–4): 366–380. Bibcode:2008PPP...270..366H. doi:10.1016/j.palaeo.2008.01.038.
Nowak EJ, Martin CE (1997). "Physiological and anatomical responses to water deficits in the CAM epiphyte Tillandsia ionantha (Bromeliaceae)". International Journal of Plant Sciences. 158 (6): 818–826. Bibcode:1997IJPlS.158..818N. doi:10.1086/297495. hdl:1808/9858. JSTOR2475361.
Canadell J, Jackson RB, Ehleringer JB, Mooney HA, Sala OE, Schulze ED (December 1996). "Maximum rooting depth of vegetation types at the global scale". Oecologia. 108 (4): 583–595. Bibcode:1996Oecol.108..583C. doi:10.1007/BF00329030. PMID28307789.
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