<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.0 20120330//EN" "JATS-journalpublishing1.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="abstract"><front><journal-meta><journal-id journal-id-type="publisher-id">INFORMATICA</journal-id><journal-title-group><journal-title>Informatica</journal-title></journal-title-group><issn pub-type="epub">0868-4952</issn><issn pub-type="ppub">0868-4952</issn><publisher><publisher-name>VU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">INF2308</article-id><article-id pub-id-type="doi">10.3233/INF-1991-2308</article-id><article-categories><subj-group subj-group-type="heading"><subject>Abstract</subject></subj-group></article-categories><title-group><article-title>Lithuanian abstracts</article-title></title-group><pub-date pub-type="epub"><day>01</day><month>01</month><year>1991</year></pub-date><volume>2</volume><issue>3</issue><fpage>455</fpage><lpage>461</lpage></article-meta></front></article>