[1] Cardoso R M R, Waters H R. Recursive calculation of finite time ruin probabilities under interest force. Insurance: Mathematics and Economics, 2003, 33: 659--676

[2] Dickson D C M, EgÍdio dos Reis A D. On the distribution of the duration of negative surplus. Scandinavian Actuarial Journal, 1996, 2: 148--164

[3] EgÍdio dos Reis A D. How long is the surplus below zero? nsurance: Mathematics and Economics, 1993, 12: 23--38

[4] EgÍdio dos Reis A D. On the moments of ruin and recovery times. Insurance: Mathematics and Economics, 2000, 27: 331--343

[5] EgÍdio dos Reis A D. How many claims does it take to get ruined and recovered. Insurance: Mathematics and Economics, 2002,
31: 235--248

[6] Gerber H U. An Introduction to Mathematical Risk Theory. Huebner Foundation Monograph Series 8. Philadelphia: SIAM, 1979

[7] Gerber H U. When dose the surplus reach a given target? Insurance: Mathematics and Economics, 1990, 9: 115--119

[8] Sundt B, Teugels J L. Ruin estimates under interest force. Insurance: Mathematics and Economics, 1995, 16: 7--22

[9] Wagner C. Time in the red in a two state Markov model. Insurance: Mathematics and Economics, 2002, 31: 365--372

[10] Yang H L, Zhang L H. On the distribution of surplus immediately after ruin under interest force. Insurance: Mathematics and Economics, 2001, 29: 247--255

[11] Zhang C, Wu R. Total duration of negative surplus for the compound Poisson process that is perturbed by diffusion. Journal of Applied Probability, 2002, 39: 517--532