Tippatai Pongsart และ Kiat Sangaroon. (2011) Discrete-time risk model in insurance with exponential claim and geometric interarrival /. Khon Kaen University,:ม.ป.ท.Tippatai Pongsart และ Kiat Sangaroon. 2011. Discrete-time risk model in insurance with exponential claim and geometric interarrival /. ม.ป.ท.:Khon Kaen University,;Tippatai Pongsart และ Kiat Sangaroon. Discrete-time risk model in insurance with exponential claim and geometric interarrival /. ม.ป.ท.:Khon Kaen University, 2011. Print.