The Editors are very grateful to the following who gave of their time and expertise to act as referees for manuscripts submitted for publication during 2019.

• Marcelo Andrade Barbosa

• Michael Anenburg

• Daniele Antonangeli

• Thomas Armbruster

• Daniel Atencio

• Tonci Balic-Zunic

• Andrei Barkov

• Stephen J Barnes

• Caitlin Beland

• Luca Bindi

• Costanza Bonadiman

• Anouk Borst

• Ferdinando Bosi

• Karel Breiter

• Geoffrey D Bromiley

• Sam Broom-Fendley

• David Brown

• Bartosz Budzyń

• Peter C Burns

• Louis J Cabri

• Fernando Cámara

• Aaron Celestian

• Jan Cempirek

• Sumit Chakraborty

• Dmitry Charkin

• Xu Cheng

• Andrew G Christy

• Nikita V Chukanov

• Marco E Ciriotti

• Giorgia Confalonieri

• Mark A Cooper

• Alan F Cooper

• Pedro Cordeiro

• Alessandra Costanzo

• John Stephen Daly

• Fabio Ramos Dias De Andrade

• Giancarlo Della Ventura

• Francesco Demartin

• Tim Dempster

• Francesco Di Benedetto

• Tatiana L Evstigneeva

• Giovanni Ferraris

• Henrik Friis

• Teodoro Gauzzi

• Fernanda Gervasoni

• Fernando Gervilla

• Gerald Giester

• Alexey Goncharov

• Jens Götze

• Ian T Graham

• Michel Gregoire

• Edward S Grew

• Ian Grey

• Joel Grice

• Vincenza Guarino

• Thomas Hainschwang

• Martin Harper

• Jason Harvey

• Frédéric Hatert

• Frank C. Hawthorne

• George Helffrich

• Grant Henderson

• Darrell Henry

• Callum J. Hetherington

• Malcolm Hole

• Jan Marten Huizenga

• Gregory Ivanyuk

• Anthony R Kampf

• Peter Kelemen

• Uwe Kolitsch

• Alkiviadis Kontonikas-Charos

• Tamer Koralay

• Andrzej Kozlowski

• Sergey V Krivovichev

• Maria Krzhizhanovskaya

• Takahiro Kuribayashi

• Ikuo Kushiro

• James Lambert-Smith

• František Laufek

• Jaromir Leichmann

• Federico Lucci

• Gregory R Lumpkin

• Ray Macdonald

• Emil Makovicky

• Anthony N Mariano

• Ernesto Mesto

• Koichi Momma

• Jean-Marc Montel

• Terry Moxon

• Mariko Nagashima

• Jens Najorka

• Barbara P Nash

• Daisuke Nishio-Hamane

• Daniela Novembre

• Thomas Oberthuer

• Kang Min Ok

• Martin Ondrejka

• Gaetano Ortolano

• Supratim Pal

• Matthew Pankhurst

• Marco Pasero

• Elio Passaglia

• Alessandro Pavese

• Igor V Pekov

• Ronald C Peterson

• Sandra Piazolo

• Adam Pieczka

• Jakub Plašil

• Olga Y Plotinskaya

• Allan Pring

• Michael Rumsey

• Michael Schaefer

• Jochen Schlüter

• Claudia Schnohr

• Richard Sillitoe

• Etienne Skrzypek

• Jakub Sliwinski

• Martin Smith

• Tyler Spano

• Kimberly T Tait

• Sergey V Titkov

• Dominique Tobler

• Peter Treloar

• Alfons M Van Den Kerkhof

• Ilya Veksler

• Gennaro Ventruti

• Anna Vymazalova

• Andrew Wilde

• Philip J Withers

• Shui-Yuan Yang

• Marina Yudovskaya

• Xie Yuling

• Federica Zaccarini

• Jiří Zachariáš

• Elena Zhitova

• Runliang Zhu