'A'
Title: Reconstruction of parameters of an optical fiber from the transmission spectrum of long-period gratings induced in this fiber
Author(s): Ivanov OV (Ivanov, Oleg V.)
Source: OPTICS COMMUNICATIONS 272 (2): 395-402 APR 15 2007  
Author's address:
INESC Porto, Unidade Optoelect & Sist, BR-4169007 Porto Alegre, RS Brazil

'B'
Title: Control of the characteristics of a long-period grating by cladding etching
Author(s): Kim SC, Jeong YC, Kim SW, Kwon JJ, Park NK, Lee B
Source: APPLIED OPTICS 39 (13): 2038-2042 MAY 1 2000