@ARTICLE\{IMM1991-02328, author = "D. Bj{\o}rner", title = "Formal Specification is an Experimental Science (in Russian)\}", year = "1991", pages = "24-43", journal = "Programmirovanie", volume = "6", editor = "", number = "", publisher = "Russian Acad. of Science, Moscow", url = "http://www2.compute.dtu.dk/pubdb/pubs/2328-full.html" }