Manuscripts submitted for publication should be in English with an abstract not exceeding 150 words in the same language. Manuscripts should be in electronic format (Word for Windows, WordPerfect forWindows/DOS) and should preferably be submitted through e-mail to the Editor in Chief (urm@eki.ee). All correspondence that can not be transmitted electronically should be sent to the editorial address. The submission of a paper is taken to imply that it has not been previously published or is not being considered for publication elsewhere.