The style is either built in or you can download a CSL file that is supported by most references management programs.
BibTeX syles are usually part of a LaTeX template. Check the instructions to authors if the publisher offers a LaTeX template for this journal.
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.
Clément G, Bukley A (2007) Artificial Gravity. Springer, New York, NY
A chapter in an edited book
Naunheimer H, Bertsche B, Ryborz J, Novak W (2011) Power Conversion: Selecting the Ratios. In: Bertsche B, Ryborz J, Novak W (eds) Automotive Transmissions: Fundamentals, Selection, Design and Application. Springer, Berlin, Heidelberg, pp 100–114
Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for Structural Chemistry.
Davis J (2017) A Giant Among Dwarfs: New Species Of Dwarf Bushbaby Discovered In Angola. In: IFLScience. Accessed 30 Oct 2018
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 Accountability Office (1994) Department of Transportation: University Research Activities Need Greater Oversight. U.S. Government Printing Office, Washington, DC
Theses and dissertations
Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.
Herron M (2013) Prescripton labels: Do you know what medication you are taking? Doctoral dissertation, California State University, Long Beach
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
Walsh MW (2016) Deadline Nears in Puerto Rico, Amid Haggling. New York Times B1
References should be cited in the text by sequential numbers in square brackets:
This sentence cites one reference . This sentence cites two references [1, 2]. This sentence cites four references [1–4].
About the journal
Full journal title
Physical and Theoretical Chemistry Condensed Matter Physics