Carefully revised manuscript in English should be typewritten with at least double spacing and with margins on both sides (3cm and 1cm) on good quality paper on one side only and submitted in duplicate. One of the copies should be typed, not xerox. The use of typewriters with large characters is desirable. Additional double spacing is required for the displayed formulae. The footnotes and bibliography should also be typewritten with double spacing.

Headings shall not be distinguished by underlying, use of caps, spacing, etc.

An abstract of not more than 200 words should be included.

Bold face type and italics in the text ought to be indicated by underlying in pencil only with a straight or wavy line, respectively.

All mathematical expressions should be typed if possible, with unavailable symbols inserted in ink in particularly clear and unambiguous way. Special typefaces (Greek, Gothic, etc.) should be clearly identified, with additional comment on the margin when ambiguity may occur.

Formulae should be numbered in parentheses, on the right-hand side. Footnotes which do not belong to the heading of the article should be numbered consecutively (in superscript without parentheses).

References to the literature should appear not as footnotes but as a numbered bibliography at the end of the article.

Journal articles should be cited by name(s) and initials of all author(s), and the internationally recognized abbreviation for the name of the journal, the volume, the number of the first page, and the year of publication. Citations of books should include the name of the author(s), full title, edition, publisher , and the place and year of publications.

Diagrams and illustrations should be submitted on separate sheets, apart from the main text. A clear unambiguous sketch is satisfactory, since it will be redrawn by the publisher. Captions to the diagrams and illustrations should be typed on a separate sheet.

No page charge will be exacted. Foreign authors are entitled to receive 50 reprints of each article free of charge.

Any changes of authors' addresses should be immediately sent to the Publisher.

Authors receive proofs without a copy of the manuscript. The proofs should be mailed to the Publisher immediately. In case the Publisher does not receive the proof within three weeks, the article will be either published without authors' corrections or delayed to further issues.

To speed up the publication process, authors are encouraged to resubmit their accepted papers in the form of a source L^AT_EX (v. 2.93 or compatible) file (in documentstyle "article") on a diskette or by e-mail: ROMP@PHYS.UNI.TORUN.PL.
Plain T_EX and AMST-_EX are also accepted. No manuscripts or diskettes will be returned unless requested by the author.

For complete up-to-date addresses of Editors please check the link to Editorial Board at the beginning of these instructions.