Hasegawa, T. I., Yoshii, Y., & Sabano, Y. "Thermal Evolution of a Contracting Hydrogen Gas Cloud" 1981, Astron & Astrophys, 98, 186.

Ogura, K., & Hasegawa, T. I. "A Survey of Northern Bok Globules for H-alpha Emission Stars", 1983, Publ Astron Soc Japan, 35, 299.

Hasegawa, T. I., Hirano, N., Kameya, O., Taniguchi, Y., Tosa, M., Takakubo, K., & Seki, M. "Cyanoacetylene Observations of B335" 1986, Publ Astron Soc Japan, 38, 379.

Kameya, O., Hasegawa, T. I., Hirano, N., Taniguchi, Y., Tosa, M., Takakubo, K., & Seki, M. "CS and C34S Observations of the NGC 7538 Molecular Cloud" 1986, Publ Astron Soc Japan, 38, 793.

Hasegawa, T. I. "Hydrostatic Models of Bok Globules" 1988, Publ Astron Soc Japan, 40, 219.

Kameya, O., Hasegawa, T. I., Hirano, N., Takakubo, K., & Seki, M. "High-Velocity Flows in the NGC 7538 Molecular Cloud" 1989, ApJ, 339, 222.

Mitchell, G. F., Maillard, J.-P., & Hasegawa, T. I. "Episodic Outflows From High-Mass Protostars" 1991, ApJ, 371, 342.

Mitchell, G. F., & Hasegawa, T. I. "An Extremely High Velocity CO Outflow from NGC 7538 IRS 9" 1991, ApJ Letters, 371, L33.

Hasegawa, T. I., Rogers, C., & Hayashi, S. S. "Observations of HCO+ in B335" 1991, ApJ, 374, 177.

Hasegawa, T. I., Mitchell, G. F., & Henriksen, R. N. "Properties of the Molecular Cloud about S 140 IRS 1 Deduced from HCO+(J=3-2) Observations" 1991, AJ, 102, 666.

Mitchell, G. F., Hasegawa, T. I., & Schella, J. "A CO J=2-1 Study of the Outflow Sources GL 490, GL 2591, M8E-IR, and W 3 IRS 5" 1992, ApJ, 386, 604.

Hasegawa, T. I., Herbst, E., & Leung, C. M. "Models of Gas-Grain Chemistry in Dense Interstellar Clouds with Complex Organic Molecules" 1992, ApJSuppl, 82, 167.

Hasegawa, T. I., & Herbst, E. "New Gas-Grain Chemical Models of Quiescent Dense Interstellar Clouds -- The Effects of H2 Tunnelling Reactions and Cosmic Ray-Induced Desorption" 1993, MNRAS, 261, 83.

Caselli, P., Hasegawa, T. I., & Herbst, E. "Chemical Differentiation betweeen Star Forming Regions: The Orion Hot Core and Compact Ridge" 1993, ApJ, 408, 548.

Hasegawa, T. I., & Herbst, E. "Three-Phase Chemical Models of Dense Interstellar Clouds -- Gas, Dust Particle Mantles, and Dust Particle Surfaces" 1993, MNRAS, 263, 589.

Caselli, P., Hasegawa, T. I., & Herbst, E. "The Production of Condensed Phase CO in Quiescent Molecular Clouds" 1993, ApJ, 421, 206.

Hasegawa, T. I., Mitchell, G. F., Matthews, H. E., & Tacconi, L. "Submillimeter Observations of CO in the W 3 Core" 1994, ApJ, 426, 215.

Mitchell, G. F., Lee, S. W., Maillard, J.-P., Hasegawa, T. I., Matthews, H. E., & Harris, A. I. "A Multi-Transition CO Study of GL 490" 1995, ApJ, 438, 794.

Mitchell, G. F., Hasegawa, T. I., Dent, W. R. F., & Matthews, H. E. "A Molecular Outflow Driven by an Optical Jet" 1995, ApJLetter, 436, L177.

Hasegawa, T. I., & Mitchell, G. F. "An HCO+ Study of NGC 7538 IRS 9 and GL 490" 1995, ApJ, 441, 665.

Hasegawa, T. I., & Mitchell, G. F. "CO J=3-2 and HCO+ J=4-3 Observations of the GL 2591 Molecular Outflow" 1995, ApJ, 451, 225.

Giannakopoulou, J., Mitchell, G. F., Hasegawa, T. I., Matthews, H. E., & Maillard, J.-P. "The Star-forming Core of Monoceros R2" 1997, ApJ, 487, 346.

Caselli, P., Hasegawa, T. I., & Herbst, E. "A Proposed Modification of the Rate Equations for Reactions on Grain Surfaces" 1998, ApJ, 495, 309.

Hasegawa, T. I., Volk, K., & Kwok, S. "A Chemical Model of the Neutral Envelope of the Planetary Nebula NGC 7027" 2000, ApJ, 532, 994.