FECENKO, Jozef. Calculating of probability generating function of total amount of claims in collective risk model. In Actuarial science in theory and in practice. International scientific conference. Actuarial science in theory and in practice : proceedings : 10th international scientific conference : 12th - 13th november 2015, Bratislava, Slovakia. - Bratislava : EKONÓM publishing, 2015. ISBN 978-80-225-4156-5, s. 91-106 CD-ROM. VEGA 1/0806/14.