@misc{improvement+of+hydraulic+system+efficiency+by+means+of+energy+recuperation,
    author = {Sobczyk, Andrzej},
    title = {Improvement of hydraulic system efficiency by means of energy recuperation},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2011}
}