Berezansky, Leonid and Braverman, Elena. "On oscillation of an impulsive logistic equation". Dynamics of Continuous, Discrete \& Impulsive Systems. Series A. Mathematical Analysis 9.3 (2002): 377-396. Print.
Berezansky, L. and Braverman, Elena. "On oscillation of equations with distributed delay". Zeitschrift f\"ur Analysis und ihre Anwendungen. Journal for Analysis and its Applications 20.2 (2001): 489-504. Print.
Berezansky, L. and Braverman, Elena. "On oscillation of a multiplicative delay logistic equation". Nonlinear Analysis. Theory, Methods \& Applications. An International Multidisciplinary Journal. Series A: Theory and Methods 47.2 (2001): 1199-1209. Print.