References
Mathematical reviews, 0025-5629Electronics and communications abstracts journal (Riverdale), 0361-3313ISMEC bulletin, 0306-0039Pollution abstracts with indexes, 0032-3624Safety science abstracts journal, 0160-1342International aerospace abstracts, 0020-5842Computer & control abstracts, 0036-8113, 1968-Electrical & electronics abstracts, 0036-8105, 1968-Physics abstracts. Science abstracts. Series A, 0036-8091, 1968-Chemical abstracts, 0009-2258