@misc{on+differentiability+with+respect+to+a+parameter+of+a+weak+solution+of+a+second+order+differential+equation+in+banach+space,
    author = {Jużyniec, Mariusz},
    title = {On differentiability with respect to a parameter of a weak solution of a second order differential equation in Banach space},
    journal = {Czasopismo Techniczne. Nauki Podstawowe},
    address = {Kraków},
    publisher = {<a href=\"http://www.wydawnictwo.pk.edu.pl/\" target=\"_blank\">Wydawnictwo PK</a>},
    date = {2010},
    number = {R. 107, Z. 1, 1-NP}
}