@article {marcus1999third,
	title = {Third-harmonic generation at atmospheric pressure in methane by use of intense femtosecond pulses in the tight-focusing limit},
	journal = {JOSA B},
	volume = {16},
	number = {5},
	year = {1999},
	pages = {792{\textendash}800},
	publisher = {Optica Publishing Group},
	author = {Marcus, G and Zigler, A and Henis, Z}
}
