1st . From action principle to path integral formalism by Shyam Kumar
2nd. First passage problem through matrix algebra approach by S. C. C. Vyom.
Dr. R.K. Brojen Singh
Room No.18,
School of Computational & Integrative Sciences
Jawaharlal Nehru University,
New Delhi-110067.| INDIA
Phone: 011-26734688
Email: brojen@mail.jnu.ac.in