How to format your references using the GEM - International Journal on Geomathematics citation style

This is a short guide how to format citations and the bibliography in a manuscript for GEM - International Journal on Geomathematics. 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
Libby, P.: Inflammation in atherosclerosis. Nature. 420, 868–874 (2002)
A journal article with 2 authors
Koch, C., Crick, F.: The zombie within. Nature. 411, 893 (2001)
A journal article with 3 authors
Melchor, R.N., Buchwaldt, R., Bowring, S.: A Late Eocene date for Late Triassic bird tracks. Nature. 495, E1-2 (2013)
A journal article with 4 or more authors
Min, J., Jang, J., Keum, D., Ryu, S.-W., Choi, C., Jeong, K.-H., Ye, J.C.: Fluorescent microscopy beyond diffraction limits using speckle illumination and joint support recovery. Sci. Rep. 3, 2075 (2013)

Books and book chapters

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

An authored book
Radcliff, P.B.: Modern Spain. John Wiley & Sons, Ltd, Chichester, UK (2017)
An edited book
Baggili, I. ed: Digital Forensics and Cyber Crime: Second International ICST Conference, ICDF2C 2010, Abu Dhabi, United Arab Emirates, October 4-6, 2010, Revised Selected Papers. Springer, Berlin, Heidelberg (2011)
A chapter in an edited book
Chen, X., Li, Y., Aparicio, C.: Biofunctional Coatings for Dental Implants. In: Nazarpour, S. (ed.) Thin Films and Coatings in Biology. pp. 105–143. Springer Netherlands, Dordrecht (2013)

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 GEM - International Journal on Geomathematics.

Blog post
Fang, J.: The Moon Gets Broadband Wireless Connection,


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: U.S. Postal Service: Information on How Broadband Affects Postal Use and the Communications Options for Rural Residents. U.S. Government Printing Office, Washington, DC (2016)

Theses and dissertations

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

Doctoral dissertation
Jaramillo, M.A.: Morphology of ferromagnetic thin films on nanosphere templates, (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
Feeney, K.: Eating at the Mega-Market, (2009)

In-text citations

References should be cited in the text by name and year in parentheses:

This sentence cites one reference (Libby 2002).
This sentence cites two references (Koch and Crick 2001; Libby 2002).

Here are examples of in-text citations with multiple authors:

  • Two authors: (Koch and Crick 2001)
  • Three or more authors: (Min et al. 2013)

About the journal

Full journal titleGEM - International Journal on Geomathematics
AbbreviationGEM Int. J. Geomath.
ISSN (print)1869-2672
ISSN (online)1869-2680
ScopeGeneral Earth and Planetary Sciences
Modelling and Simulation

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