How to format your references using the International Journal of Theoretical Physics citation style

This is a short guide how to format citations and the bibliography in a manuscript for International Journal of Theoretical Physics (Int J Theor Phys). For a complete guide how to prepare your manuscript refer to the journal's instructions to authors.

Using reference management software

Typically you don't format your citations and bibliography by hand. The easiest way is to use a reference manager:

PaperpileThe citation style is built in and you can choose it in Settings > Citation Style or Paperpile > Citation Style in Google Docs.
EndNoteFind the style here: output styles overview
Mendeley, Zotero, Papers, and othersThe style is either built in or you can download a CSL file that is supported by most references management programs.
BibTeXBibTeX syles are usually part of a LaTeX template. Check the instructions to authors if the publisher offers a LaTeX template for this journal.

Journal articles

Those examples are references to articles in scholarly journals and how they are supposed to appear in your bibliography.

Not all journals organize their published articles in volumes and issues, so these fields are optional. Some electronic journals do not provide a page range, but instead list an article identifier. In a case like this it's safe to use the article identifier instead of the page range.

A journal article with 1 author
Smith, C.: Genomics: SNPs and human disease. Nature. 435, 993 (2005)
A journal article with 2 authors
Bradford, L., O’Tierney, P.: Three-person rule was not set by Nobel himself. Nature. 411, 413 (2001)
A journal article with 3 authors
Rokas, A., Krüger, D., Carroll, S.B.: Animal evolution and the molecular signature of radiations compressed in time. Science. 310, 1933–1938 (2005)
A journal article with 4 or more authors
Zhao, D., Katsouras, I., Li, M., Asadi, K., Tsurumi, J., Glasser, G., Takeya, J., Blom, P.W.M., de Leeuw, D.M.: Polarization fatigue of organic ferroelectric capacitors. Sci. Rep. 4, 5075 (2014)

Books and book chapters

Here are examples of references for authored and edited books as well as book chapters.

An authored book
Cortada, J.W.: The Essential Manager. John Wiley & Sons, Inc, Hoboken, NJ (2014)
An edited book
Papathanasiou, J., Ploskas, N., Linden, I. eds: Real-World Decision Support Systems: Case Studies. Springer International Publishing, Cham (2016)
A chapter in an edited book
Mañas, P., Vercet, A.: Effect of PEF on Enzymes and Food Constituents. In: Raso, J. and Heinz, V. (eds.) Pulsed Electric Fields Technology for the Food Industry: Fundamentals and Applications. pp. 131–151. Springer US, Boston, MA (2006)

Web sites

Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for International Journal of Theoretical Physics.

Blog post
Andrew, E.: Nikon’s 2013 Small World Photomicrography Winners Have Been Announced,’s-2013-small-world-photomicrography-winners-have-been-announced/


This example shows the general structure used for government reports, technical reports, and scientific reports. If you can't locate the report number then it might be better to cite the report as a book. For reports it is usually not individual people that are credited as authors, but a governmental department or agency like "U. S. Food and Drug Administration" or "National Cancer Institute".

Government report
Government Accountability Office: Tax Systems Modernization: Time Tables for Critical Planning Documents. U.S. Government Printing Office, Washington, DC (1993)

Theses and dissertations

Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.

Doctoral dissertation
Lew, M.M.: Hydroxyl, Hydroperoxyl, and Organic Peroxy Radical Chemistry in Forested Areas: Measurements, Modeling and Implications for Atmospheric Chemistry, (2017)

News paper articles

Unlike scholarly journals, news papers do not usually have a volume and issue number. Instead, the full date and page number is required for a correct reference.

New York Times article
Saslow, L.: SAILING, (2008)

In-text citations

References should be cited in the text by sequential numbers in square brackets:

This sentence cites one reference [1].
This sentence cites two references [1, 2].
This sentence cites four references [1–4].

About the journal

Full journal titleInternational Journal of Theoretical Physics
AbbreviationInt. J. Theor. Phys.
ISSN (print)0020-7748
ISSN (online)1572-9575
ScopeGeneral Mathematics
Physics and Astronomy (miscellaneous)

Other styles