Lithuanian Mathematical Journal
Lithuanian Mathematical Journal > 2019 > 59 > 1 > 17-23
Lithuanian Mathematical Journal > 2019 > 59 > 1 > 81-95
Lithuanian Mathematical Journal > 2019 > 59 > 3 > 412-424
Lithuanian Mathematical Journal > 2019 > 59 > 1 > 17-23
Lithuanian Mathematical Journal > 2019 > 59 > 1 > 81-95
Lithuanian Mathematical Journal > 2019 > 59 > 3 > 412-424