"Effective scaling behavior of magnetization and Hamming distance in Ising thin films under a surface field", Luz EMD, Siqueira AF, Costa UMS, Lyra ML, EUROPEAN PHYSICAL JOURNAL B 12, 115 (1999).

"Optimizing the success of random searches", Viswanathan GM, Buldyrev SV, Havlin S, da Luz MGE, Raposo EP, Stanley HE, NATURE 401, 911 (1999).

"Space-time break-up in the self-focusing of ultrashort pulses", Fonseca EJ, Cavalcanti SB, Hickmann JM, OPTICS COMMUNICATIONS, 169, 199 (1999).

"Circular-like maps: sensitivity to the initial conditions, multifractality and nonextensivity", Tirnakli U, Tsallis C, Lyra ML, EUROPEAN PHYSICAL JOURNAL B 11, 309 (1999).

"Fourfold output power enhancement and threshold reduction through thermal effects in an Er3+/Yb3+-codoped optical fiber laser excited at 1.064 mu m", da Silva CJ, de Araujo MT, Gouveia EA, Gouveia-Neto AS, OPTICS LETTERS, 24, 1287 (1999).

"Low-dimensional non-linear dynamical systems and generalized entropy", da Silva CR, da Cruz HR, Lyra ML, BRAZILIAN JOURNAL OF PHYSICS 29, 144 (1999).

"Thermally induced threefold upconversion emission enhancement in nonresonant excited Er3+/Yb3+-codoped chalcogenide glass", dos Santos PV, Gouveia EA, de Araujo MT, Gouveia-Neto AS, Sombra ASB, Neto JAM, APPLIED PHYSICS LETTERS 74, 3607 (1999).

"Correlation-induced metal-insulator transition in the one-dimensional Anderson model", de Moura FABF, Lyra ML, PHYSICA A 266, 465 (1999).

"Efficient search of critical points in Ising-like systems", Fulco UL, Lucena LS, Viswanathan GM, PHYSICA A 264, 171 (1999).

"Experimental observation of interfering Bessel beams", Chavez-Cerda S, Tepichin E, Meneses-Nava MA, Ramirez G, Hickmann JM, OPTICS EXPRESS 3, 524 (1999).