A	Coefficient
B	Coefficient
AC	Adiabatic calorimeter
CV	Capillary viscometer
DM	Dilatometer
DSC	Differential scanning calorimetry
FV	Falling-body viscometer
g	Study/cluster number
G	Total number of studies/clusters
HM	Hydrometer
HW	Hydrostatic weighing
$H_0$	Null hypothesis
IM	Inverse method
N	Number of observations
n/a	Not available
NC	Not classified
OR	Own research
PM	Pycnometer
RR	Rotational rheometer
SC	Stationary cylinder
SP	Stationary plate
$t_{\alpha /2}$	Critical value from a student t-distribution
T	Temperature
TA	Transient thermal analyser
$T_c$	Extrapolated offset temperature
$T_e$	Extrapolated onset temperature
$T_f$	Final peak temperature
$T_i$	Initial peak temperature
$T_p$	Peak maximum temperature
TP	Transient plane source
$T_{*}$	Temperature with insufficient information about its determination
TR	Translational rheometer
TW	Transient hot wire
VE	Vibrating-element
VV	Vibrating viscometer
${\widehat{\mathbf{V}}}_{OLS}$	Esitmated variance-covariance matrix of the ordinary least squares estimator
${\widehat{\mathbf{V}}}_{WLS}$	Esitmated variance-covariance matrix of the weighted least squares estimator
$\mathbf{W}$	Weighting matrix
$\mathbf{x}$	Explanantory variable vector
$\mathbf{X}$	Explanantory variable matrix
y	Measured values
$\mathbf{y}$	Vector of measured values
$\widehat{y}$	Estimated value
$\alpha$	Significance level
$\beta$	Parameter
$\mathit{\beta }$	Parameter vector
$\widehat{\mathit{\beta }}$	Estimated parameter vector
${\widehat{\mathit{\beta }}}_{OLS}$	Ordinary least squares estimator
${\widehat{\mathit{\beta }}}_{WLS}$	Weighted least squares estimator
$\epsilon$	Random error term
$\tilde{\mathit{\epsilon }}$	Vector of residuals
$\eta$	Viscosity
$\sigma$	Uncertainty of observation