@article{7e669046d6544f859c886dbff1ab85af,
title = "A Nationally Representative Study of the Hardening Hypothesis Among Educational Groups Over Four Decades",
keywords = "Nicotine dependence, Tobacco control, Socioeconomic inequalities, Smoking prevalence, European countries, Population, Cigarette, Hard, Predictors, Cessation, 3142 Public health care science, environmental and occupational health",
author = "Otto Ruokolainen and Maarit Piirtola and Tellervo Korhonen and Ossi Rahkonen and Tommi H{\"a}rk{\"a}nen",
year = "2023",
month = aug,
day = "19",
doi = "10.1093/ntr/ntad057",
language = "English",
volume = "25",
pages = "1538–1546",
journal = "Nicotine & Tobacco Research",
issn = "1462-2203",
publisher = "Oxford University Press",
number = "9",
}