A parabolic integro-differential identification problem in a barrelled smooth domainJanno, Jaan; Lorenzi, AlfredoZeitschrift für Analysis und ihre Anwendungen = Journal for analysis and its applications2006 / p. 103-130 https://ems.press/journals/zaa/articles/1069

Paraboolsete integrodiferentsiaalvõrrandite positiivsusprintsiipJanno, JaanAastaraamat 2009 / Eesti Matemaatika Selts2010 / lk. 35-43

A positivity principle for parabolic integro-differential equations and final overdeterminationJanno, JaanDirect, Inverse and Control Problems for PDE's : DICOP : Cortona, 22-26.09.2008 : abstracts2008 / p. 12 https://www.aimsciences.org/article/doi/10.3934/ipi.2009.3.17