Austin, Daniel F. (2004). Florida Ethnobotany. CRC Press. p. 363.
RHS A-Z encyclopedia of garden plants. RU: Dorling Kindersley. 2008. p. 1136. ISBN1405332964.
Ciesla, William M. (2002). Non-wood Forest Products from Temperate Broad-leaved Trees(en inglés). Food and Agriculture Organization of the United Nations. p. 13. ISBN9789251048559. «Holly is still a popular Christmas decoration among Christian cultures.»
Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan ISBN0-333-47494-5
Kellie P. Burris; Federico M. Harte; P. Michael Davidson; C. Neal Stewart Jr; Svetlana Zivanovic (2012). «Composition and bioactive properties of yerba mate (Ilex paraguariensis A. St.-Hil.): A review». Chilean Journal of Agricultural Research72 (2): 268-274.
Nettleship, Henry (1889). Contributions to Latin lexicography. Clarendon Press. p. 27.
Skeat, Walter William (1887). Principles of English etymology, v. 1. London, U.K.: Clarendon Press. p. 371.
T. F. Hoad, English Etymology, Oxford University Press, 1993 ISBN 0-19-283098-8, p. 218b.
Sanford Niles, ed. (1895). Christmas History and Customs(en inglés). School Education Company. p. 24. «In Germany and Scandinavia the holly, or holy tree, is called "Christ's thorn," from its use in church decorations, and because it bears berries at Christmas-tide.»
Skeat, Walter William (2005). A Concise Etymological Dictionary of the English language. Cosimo, Inc. p. 244. ISBN978-1-59605-092-1.