If more than one author is at the same institution, you only need one number for that institution. Do not use references in abstract. Do not use abbreviations in abstract. Text Follow general instructions above. In the manuscript authors may use any style, but they should be sure that the different levels of headings are distinguished from one another.
References Write out journal names completely.
Do not abbreviate. Capitalize all nouns in German. Cite references in alphabetical order by first author's surname. The name of the journal or publisher should be included. Insert a period and a space after each initial of an author's name.