1. One and two photon optogalvanic spectrum of Ne: 610-730 nm.
K. Nrayanan, G. Ullas, and S. B. Rai
Chem. Phys. Lett 156, 55, 1989.

2. Laser optogalvanic and emission spectrum of N2 in the 5400-6150 A region.
G. Ullas, and S. B. Rai.
Pramana - J.Phys. 36, 647, 1991.

3. A two step optical double resonance study of a Fe-Ne hollow cathode discharge using laser optogalvanic detection.
G. Ullas, S. B. Rai and D. K. Rai.
Chem. Phys. Lett 184, 102, 1991.

4. Two photon optogalvanic spectrum of the C-X system of HgBr.
G. Ullas, S.B.Rai and D.K.Rai.
J.Phy. B.:At. Mol. Opt. Phys. 25, 4497, 1992.

5. Two photon optogalvanic spectrum of the D-X system of HgBr.
G. Ullas, V. Kumar and S.B.Rai.
Pramana - J.Phys. 39, 359, 1992.

6. Overtone Spectroscopy of benzaldehyde.
P.K.Srivastava, G. Ullas and S. B. Rai.
Pramana-J. Phys. 43, 231, 1994.

7. Multiphoton ionization spectrum of iodine.
I.B. Singh, K. K. Mahato, G.Ullas, and S. B. Rai.
Asian J.Physics. 5, 371,1996.

8. Optogalvanic spectrum of Ne in the 410-540 nm region.
Manoj Kumar, G. Ullas, and S. B. Rai.
Physica Scripta. 55, 676, 1997.

9. Laser Raman Spectroscopy : Some clinical applications.
G. Ullas, Sudhakar S. Nayak, K. Gopalakrishna, Jose Jacob, Jacob Kurien, Keerthilatha M. Pai, Manoj Vengal, Manna Valiathan, R. Jyothi Lakshmi, K. Venkata Krishna, K Raghavendra, and V. B. Kartha.
Current Science, 77, 908, 1999

10. Optical Pathology of oral tissues: A Raman spectroscopy diagnostic method.
K. Venkatakrishna, Jacob Kurien, Keerthilatha M. Pai, Manna Valiathan, Nirmala Nagesh Kumar, C. Muralikrishna,
G. Ullas and V.B. Kartha.
Current Science, 80, 665, 2001.

11. Tissue Raman spectroscopy for study of radiation damage: Brain irradiation of mouse models.
R. Jyothi Lakshmi, V. B. Kartha, C. Muralikrishna, J. G. R. Solomen, G.Ullas and P. Uma Devi.
Radiat Res. 157(2), 175, 2002

12. Ultrasensitive spectroscopy of multicomponent physiological systems for detection of tumor markers.
Venkatakrishna K., Jacob Kurien, Kartha V. B., Mohan Alaxander, Murali Krishna C., Reena Mary Joseph,
and G. Ullas.
Current Science (Communicated)

13. Laser Spectroscopy studies on Radiation Response in Mouse Models.
R.Jyothi Lakshmi, P. Uma Devi, G.Ullas and V.B. Kartha
Proceedings of the National Laser Symposium, New Delhi, India, 305, 2001.

14. Laser Spectroscopy Monitoring of Cancer Therapy.
R. Jyothi Lakshmi, Mohan Alexander, G.Ullas and V.B. Kartha
Proceedings of the National Laser Symposium, New Delhi, India, 307, 2001.

15. Ultrasensitive Photoacoustic Spectroscopy for Biomedical Applications.
Geojy Mathew, P. Vasudevan, C. Murali Krishna, U. C. Niranjan, I Narayana, G.Ullas and V. B. Kartha.
Proceedings of the National Laser Symposium, New Delhi, India, 309, 2001.

16. Tunable Pulsed Laser Fluorescence Spectroscopy of Ureteral Tissue.
S. Manjunathan, F. Natarajan, K. Sasidharan, G.Ullas R. Jyothi Lakshmi, C. Murali Krishna, and V.B. Kartha.
Proceedings of the National Laser Symposium, New Delhi, India, 311, 2001.

17. Laser Raman Spectroscopy for Drug Charecterisation and Quantitation.
Vijashree S. Nayak, Nirmala Markandeya, Sandra Albert, G.Ullas and V. B. Kartha
Proceedings of the National Laser Symposium, New Delhi, India, 313, 2001.

18. Ultrasensitive Laser Spectroscopy of Multicomponent Systems.
K. VenkateKrishna, Reena Mary Joseph,, P. Vasudevan, C. Murali Krishna, G.Ullas and V. B. Kartha.
Proceedings of the National Laser Symposium, New Delhi, India, 315, 2001.

19. Protein Profiles in Oral Premalignancies: A laer spectroscopy Study.
K. Venkatakrishna, Keerthilatha M. Pai, C. Murali Krishna, O. Ravikiran, P. Vasudevan, G.Ullas and V. B. Kartha.
Proceedings of the National Laser Symposium, Indore, India, 345, 2002.

20. Laser Raman Spectroscopy of ORN.
R.Jyothi Lakshmi, Mohan Alexander, G.Ullas and V. B. Kartha.
Proceedings of the National Laser Symposium, Indore, India, 347, 2002.