Contribution of unburned lubricating oil and gasoline-derived n-alkanes to particulate emission from non-catalyst and catalyst-equipped two-stroke mopeds operated with synthetic lubricating oil, Spezzano, Pasquale, Picini P., and Cataldi D. , Journal of Environmental Monitoring, Volume 10, Number 10, p.1202-1210, (2008)

Particle-phase polycyclic aromatic hydrocarbon emissions from non-catalysed, in-use four-stroke scooters, Spezzano, Pasquale, Picini P., Cataldi D., Messale F., Manni C., and Santino D. , Environmental Monitoring and Assessment, Volume 133, Number 1-3, p.105-117, (2007)