@book{14859,
	author = {Varadhan, S. R. S. and Muthuramalingam, PL. ; notes by-},
	title = {Diffusion problems and partial differential equations; lectures on-},
	publisher = {Narosa},
	year = {1980},
	series = {TIFR lectures on Mathematics and Physics},
	address = {New Delhi}
}