Papers must be sent in word format or plain text. We recommend, for example, a style like the APL Quote Quad Article Template (see

For others formats contact with editor This email address is being protected from spambots. You need JavaScript enabled to view it.

There is no strict limit on the length of a paper

Language: Journal of J is published in English (a reduced version is published in Spanish.)

The Title Page

  • The title page should contain (1) title of article (do not use abbreviations); (2) authors' names; (3) authors' affiliations, including adequate postal addresses;


  • The abstract should be and precise, but with enough information for the reader to understand the main points highlighted in the paper without having to read the whole article.
  • List of not more than eight keywords.

The Text

  • There is no artificial limit to the length of a paper, but letters to the Editor should preferably be restricted to 2 printed pages in order to speed up the refereeing process.
  • The words, "section"/"sections", "figure/figures" and "equation"/"equations", should be abbreviated as "Sec./Secs.", "Fig./Figs.", and "Eq./Eqs.", respectively, whenever they occur within a sentence, e.g., Eq. (24), Eqs. (7)-(10), Fig. 11, Figs. 12-13, Sec. 5. They should, however, be spelled out in full when they occur at the beginning of a sentence.
  • Number sections, figures and tables using arabic numerals. Subsections should be numbered using the decimal system (e.g. "3.2" means subsection 2 under section 3).
  • Equations are labeled with arabic numbers which are enclosed within parentheses and set on the right-hand margin. When an equation is cited in the text, the equation number should be in parentheses, e.g. Eq. (7), not Eq. 7.
  • Notations must be legible, clear, compact and consistent with standard usage. All nonstandard symbols must be defined when first mentioned and at all subsequent times when confusion might arise. Distinction should be made between capital and lower cases; between the letter O and zero (0); between the letter I and the number 1 and prime; between k and kappa. A vector will be printed boldface, and to indicate this, the letter should be underscored with a single wary line.
  • Cite in numerical order every reference, figure and table. (Order of mention in text determines the number given to each). Use Arabic numerals in superscript to cite references.


  • As a footnote to the text.


  • Place immediately after text.
  • Number the references in order of which they are mentioned in the text.
  • Abbreviate titles of journals according to the style used in the AIP Style Manual.
  • Follow the correct form of citing references


  • Place each table on a new page.
  • Give each table a number (in arabic numerals) and a title. Number tables in order of which they are mentioned in the text.
  • Provide a footnote to each table - identifying in alphabetical order all abbreviations used.


  • Figures should be professionally drawn; freehand lettering is unacceptable.
  • Use black ink for all charts and line drawings. Make decimals, broken lines, etc. strong enough for reproduction.
  • All essential details must be legible after a reduction of at least 50%.
  • Use arrows to designate special features.
  • Number figures in order of which they are mentioned in the text.


  • Appendices, if any, will be placed at the end of the paper, after the list of references. Subsections within the Appendix will be numbered as A.1, A.2, etc.