@article{805506, author = {K Petrov and S Waltman and U Simon and R Curl and F Tittel and E Dlugokencky and Leo Hollberg}, title = {Detection of Methane in Air Using Diode-Laser Pumped Difference-Frequency Generation Near 3.2 υm}, year = {1995}, number = {61}, month = {1995-01-01 00:01:00}, publisher = {Appl Phys B}, language = {en}, }